You are an assistant tasked with analyzing measurement histories to predict the patient's next laboratory or vital sign value.
<PatientData>
Demographics: {'race': 'White', 'gender': 'FEMALE', 'year of birth': 1964}
Prior Diagnosis 1: {'condition': 'Prediabetes', 'condition status': 'Not Extracted', 'start date': '1994-04-25', 'end date': None}
Prior Diagnosis 2: {'condition': 'Acute viral pharyngitis (disorder)', 'condition status': 'Not Extracted', 'start date': '2011-06-18', 'end date': '2011-06-30'}
Prior Diagnosis 3: {'condition': 'Acute viral pharyngitis (disorder)', 'condition status': 'Not Extracted', 'start date': '2011-11-30', 'end date': '2011-12-15'}
Last Potassium measurement on 2015-06-17 00:00:00: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mmol/L', 'value': 4.31}
Prior measurements of the same type 1: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mmol/L', 'value': 4.47}
Prior measurements of the same type 2: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'mmol/L', 'value': 4.16}
Prior measurements of the same type 3: {'measurement': 'Potassium', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mmol/L', 'value': 4.31}
Prior measurements of different types 1: {'measurement': 'Oral temperature', 'measurement type': 'EHR encounter record', 'measurement date': '2011-06-20T00:00:00', 'unit': 'Cel', 'value': 37.0}
Prior measurements of different types 2: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': '%', 'value': 6.1}
Prior measurements of different types 3: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'cm', 'value': 168.58}
Prior measurements of different types 4: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'kg', 'value': 96.76}
Prior measurements of different types 5: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'kg/m2', 'value': 34.05}
Prior measurements of different types 6: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mmHg', 'value': 106.0}
Prior measurements of different types 7: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mmHg', 'value': 89.0}
Prior measurements of different types 8: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': '%', 'value': 6.1}
Prior measurements of different types 9: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mg/dL', 'value': 96.0}
Prior measurements of different types 10: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mg/dL', 'value': 13.0}
Prior measurements of different types 11: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 12: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mg/dL', 'value': 9.77}
Prior measurements of different types 13: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mmol/L', 'value': 138.0}
Prior measurements of different types 14: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mmol/L', 'value': 103.0}
Prior measurements of different types 15: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mmol/L', 'value': 22.0}
Prior measurements of different types 16: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mg/dL', 'value': 167.0}
Prior measurements of different types 17: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mg/dL', 'value': 147.0}
Prior measurements of different types 18: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mg/dL', 'value': 69.0}
Prior measurements of different types 19: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2011-09-19T00:00:00', 'unit': 'mg/dL', 'value': 68.0}
Prior measurements of different types 20: {'measurement': 'Oral temperature', 'measurement type': 'EHR encounter record', 'measurement date': '2011-12-04T00:00:00', 'unit': 'Cel', 'value': 37.0}
Prior measurements of different types 21: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': '%', 'value': 5.9}
Prior measurements of different types 22: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'cm', 'value': 168.58}
Prior measurements of different types 23: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'kg', 'value': 99.35}
Prior measurements of different types 24: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'kg/m2', 'value': 34.96}
Prior measurements of different types 25: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'mmHg', 'value': 107.0}
Prior measurements of different types 26: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'mmHg', 'value': 73.0}
Prior measurements of different types 27: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': '%', 'value': 5.9}
Prior measurements of different types 28: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'mg/dL', 'value': 67.0}
Prior measurements of different types 29: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'mg/dL', 'value': 13.0}
Prior measurements of different types 30: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 31: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'mg/dL', 'value': 9.81}
Prior measurements of different types 32: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'mmol/L', 'value': 143.0}
Prior measurements of different types 33: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'mmol/L', 'value': 105.0}
Prior measurements of different types 34: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2013-08-04T00:00:00', 'unit': 'mmol/L', 'value': 23.0}
Prior measurements of different types 35: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': '%', 'value': 5.9}
Prior measurements of different types 36: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'cm', 'value': 168.58}
Prior measurements of different types 37: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'kg', 'value': 99.35}
Prior measurements of different types 38: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'kg/m2', 'value': 34.96}
Prior measurements of different types 39: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mmHg', 'value': 117.0}
Prior measurements of different types 40: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mmHg', 'value': 75.0}
Prior measurements of different types 41: {'measurement': 'Hemoglobin A1c/Hemoglobin.total in Blood', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': '%', 'value': 5.9}
Prior measurements of different types 42: {'measurement': 'Glucose', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mg/dL', 'value': 94.0}
Prior measurements of different types 43: {'measurement': 'Urea Nitrogen', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mg/dL', 'value': 13.0}
Prior measurements of different types 44: {'measurement': 'Creatinine', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mg/dL', 'value': 1.0}
Prior measurements of different types 45: {'measurement': 'Calcium', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mg/dL', 'value': 9.71}
Prior measurements of different types 46: {'measurement': 'Sodium', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mmol/L', 'value': 138.0}
Prior measurements of different types 47: {'measurement': 'Chloride', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mmol/L', 'value': 103.0}
Prior measurements of different types 48: {'measurement': 'Carbon Dioxide', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mmol/L', 'value': 25.0}
Prior measurements of different types 49: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mg/dL', 'value': 162.0}
Prior measurements of different types 50: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mg/dL', 'value': 102.0}
Prior measurements of different types 51: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mg/dL', 'value': 77.0}
Prior measurements of different types 52: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2015-06-17T00:00:00', 'unit': 'mg/dL', 'value': 64.0}
Visit 1: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2011-06-20', 'end datetime': '2011-06-20'}
Visit 2: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2011-09-19', 'end datetime': '2011-09-19'}
Visit 3: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2011-12-04', 'end datetime': '2011-12-04'}
Visit 4: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2013-08-04', 'end datetime': '2013-08-04'}
Visit 5: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2014-06-27', 'end datetime': '2014-06-27'}
Visit 6: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2015-06-17', 'end datetime': '2015-06-17'}
Procedure 1: {'procedure': 'Documentation of current medications', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2011-09-19', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Procedure 2: {'procedure': 'Documentation of current medications', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2013-08-04', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Procedure 3: {'procedure': 'Colonoscopy', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2014-06-27', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
Procedure 4: {'procedure': 'Documentation of current medications', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2015-06-17', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
</PatientData>
Based on the trajectory above, what will the patient's **next** Potassium value be on 2016-06-21 00:00:00?
A. 4.51
B. 4.93
C. 4.17
D. 4.87
E. 5.16
Please share a single capital letter representing your selected answer: 
4.51 4.93 4.17 4.87 5.16