Jane failed to understand how serious her illness was until she spoke to the doctor
Question: Jane failed to understand how serious her illness was until she spoke to the doctor.
A. The doctor said that Jane's illness was very serious.
B. Jane went to see the doctor because she knew that her illness was serious.
C. Jane didn't understand how serious her illness was.
D. It was not until she spoke to the doctor that Jane could understand how serious her illness was.