A 14-year-old adolescent female from another state was followed for 7 years for a history of insulin-dependent diabetes mellitus. At your clinic her hemoglobin A1C is 14.9%. This laboratory test indicates which of the following?

A. Her glucose control is poor.
B. She does not have insulin-dependent diabetes.
C. She has entered the “honeymoon phase” of her diabetes.
D. She has an underlying infection.
E. She is demonstrating the Somogyi phenomenon.