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': 1983}
Last Body Mass Index measurement on 2012-05-10 00:00:00: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-10T00:00:00', 'unit': 'kg/m2', 'value': 31.9}
Prior measurements of the same type 1: {'measurement': 'Body Mass Index', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-10T00:00:00', 'unit': 'kg/m2', 'value': 31.9}
Prior measurements of different types 1: {'measurement': 'Body Height', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-10T00:00:00', 'unit': 'cm', 'value': 156.97}
Prior measurements of different types 2: {'measurement': 'Body Weight', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-10T00:00:00', 'unit': 'kg', 'value': 78.6}
Prior measurements of different types 3: {'measurement': 'Systolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-10T00:00:00', 'unit': 'mmHg', 'value': 134.0}
Prior measurements of different types 4: {'measurement': 'Diastolic Blood Pressure', 'measurement type': 'EHR encounter record', 'measurement date': '2012-05-10T00:00:00', 'unit': 'mmHg', 'value': 70.0}
Visit 1: {'visit': 'Outpatient Visit', 'visit type': 'EHR encounter record', 'start datetime': '2012-05-10', 'end datetime': '2012-05-10'}
Medication 1: {'Drug name': 'Penicillin V Potassium 250 MG', 'Start datetime': '1985-10-16', 'End datetime': '1985-10-16', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Medication 2: {'Drug name': 'Penicillin V Potassium 250 MG', 'Start datetime': '1992-07-29', 'End datetime': '1992-07-29', 'Route': None, 'Quantity': 'Not Extracted', 'Stop Reason': 'Not Extracted', 'Dose Unit': 'Not Extracted'}
Procedure 1: {'procedure': 'Documentation of current medications', 'procedure type': 'EHR encounter record', 'procedure start datetime': '2012-05-10', 'procedure end datetime': 'Not Extracted', 'modifier': 'Not Extracted'}
</PatientData>
Based on the trajectory above, what will the patient's **next** Body Mass Index value be on 2015-09-26 00:00:00?
A. 33.2
B. 20.82
C. 39.15
D. 16.63
E. 22.05
Please share a single capital letter representing your selected answer: 
33.2 20.82 39.15 16.63 22.05