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': 1971}
Last Body Mass Index measurement on 2014-04-26 00:00:00: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-26T00:00:00', 'unit': 'kg/m2', 'value': 31.54}
Prior measurements of the same type 1: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2012-08-18T00:00:00', 'unit': 'kg/m2', 'value': 30.56}
Prior measurements of the same type 2: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-26T00:00:00', 'unit': 'kg/m2', 'value': 31.54}
Prior measurements of different types 1: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2012-08-18T00:00:00', 'unit': 'cm', 'value': 166.27}
Prior measurements of different types 2: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2012-08-18T00:00:00', 'unit': 'kg', 'value': 84.47}
Prior measurements of different types 3: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2012-08-18T00:00:00', 'unit': 'mmHg', 'value': 106.0}
Prior measurements of different types 4: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2012-08-18T00:00:00', 'unit': 'mmHg', 'value': 80.0}
Prior measurements of different types 5: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-26T00:00:00', 'unit': 'cm', 'value': 166.27}
Prior measurements of different types 6: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-26T00:00:00', 'unit': 'kg', 'value': 87.2}
Prior measurements of different types 7: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-26T00:00:00', 'unit': 'mmHg', 'value': 107.0}
Prior measurements of different types 8: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-26T00:00:00', 'unit': 'mmHg', 'value': 82.0}
Prior measurements of different types 9: {'measurement': 'Total Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-26T00:00:00', 'unit': 'mg/dL', 'value': 167.0}
Prior measurements of different types 10: {'measurement': 'Triglycerides', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-26T00:00:00', 'unit': 'mg/dL', 'value': 137.0}
Prior measurements of different types 11: {'measurement': 'Low Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-26T00:00:00', 'unit': 'mg/dL', 'value': 75.0}
Prior measurements of different types 12: {'measurement': 'High Density Lipoprotein Cholesterol', 'measurement type': 'EHR encounter record', 'measurement date': '2014-04-26T00:00:00', 'unit': 'mg/dL', 'value': 64.0}
Visit 1: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2012-08-18', 'end datetime': '2012-08-18'}
Visit 2: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2014-04-26', 'end datetime': '2014-04-26'}
Medication 1: {'Drug name': 'Penicillin V Potassium 500 MG', 'Start datetime': '2004-11-25', 'End datetime': '2004-11-25', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
</PatientData>
Based on the trajectory above, what will the patient's **next** Body Mass Index value be on 2016-01-09 00:00:00?
A. 32.69
B. 21.4
C. 38.73
D. 38.39
E. 20.4
Please share a single capital letter representing your selected answer: 
32.69 21.4 38.73 38.39 20.4