When the Patient with Type 2 Diabetes Says,"Why in the World

When the patient with type 2 diabetes says,"Why in the world are they looking at my hemoglobin? I thought my problem was with my blood sugar." The nurse responds that the level of hemoglobin A1c:

A) Shows how a high level of glucose can cause a significant drop in the hemoglobin level.
B) Shows what the glucose level has done during the last 3 months.
C) Indicates a true picture of the patient's nutritional state.
D) Reflects the effect of a high level of glucose on the ability to produce red blood cells (RBCs) .