The Diabetic Patient Who Had Blood Drawn for an HbA?c

The diabetic patient who had blood drawn for an HbA?c level says,"I don't know why they want to look at my hemoglobin." The most helpful reply by the nurse would be:

A) "The test is to evaluate your present level of blood sugar."
B) "The HbA1c provides information relative to blood sugar levels from the past 2 to 3 months."
C) "Hemoglobin levels and blood sugar levels are closely related."
D) "The HbA1c tells if you have type 1 or type 2 diabetes."