You are an assistant tasked with analyzing measurement histories to predict the patient's next laboratory or vital sign value.
<PatientData>
Demographics: {'race': None, 'gender': 'MALE', 'year of birth': 1991}
Last Body Mass Index measurement on 2011-11-21 00:00:00: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2011-11-21T00:00:00', 'unit': 'kg/m2', 'value': 21.37}
Prior measurements of the same type 1: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-24T00:00:00', 'unit': 'kg/m2', 'value': 20.71}
Prior measurements of the same type 2: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2011-11-21T00:00:00', 'unit': 'kg/m2', 'value': 21.37}
Prior measurements of different types 1: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-24T00:00:00', 'unit': 'cm', 'value': 183.04}
Prior measurements of different types 2: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-24T00:00:00', 'unit': 'kg', 'value': 69.4}
Prior measurements of different types 3: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-24T00:00:00', 'unit': 'mmHg', 'value': 118.0}
Prior measurements of different types 4: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2010-10-24T00:00:00', 'unit': 'mmHg', 'value': 88.0}
Prior measurements of different types 5: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2011-11-21T00:00:00', 'unit': 'cm', 'value': 183.11}
Prior measurements of different types 6: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2011-11-21T00:00:00', 'unit': 'kg', 'value': 71.64}
Prior measurements of different types 7: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2011-11-21T00:00:00', 'unit': 'mmHg', 'value': 111.0}
Prior measurements of different types 8: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2011-11-21T00:00:00', 'unit': 'mmHg', 'value': 74.0}
Visit 1: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2010-10-24', 'end datetime': '2010-10-24'}
Visit 2: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2011-11-21', 'end datetime': '2011-11-21'}
Medication 1: {'Drug name': 'Penicillin V Potassium 250 MG', 'Start datetime': '1995-04-30', 'End datetime': '1995-04-30', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Medication 2: {'Drug name': 'Penicillin V Potassium 250 MG', 'Start datetime': '2003-03-15', 'End datetime': '2003-03-15', '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 2015-01-20 00:00:00?
A. 25.15
B. 28.91
C. 22.45
D. 28.24
E. 38.5
Please share a single capital letter representing your selected answer: 
25.15 28.91 22.45 28.24 38.5