Hemoglobin A₁C Measurement Can Be Used to Monitor Diabetic Patients

Hemoglobin A₁C measurement can be used to monitor diabetic patients.The unique advantage of this test is that:

A) It determines glucose tolerance rather than glucose concentration.
B) It is more selective for glucose than any other commonly used laboratory test.
C) It monitors the long-term control of blood glucose.
D) It is especially accurate in determining the blood glucose concentration.
E) It assesses not the effects of glucose but those of ketone bodies.