Although Not a Routine Clinical Laboratory Screening Test,measurement of Insulin

Although not a routine clinical laboratory screening test,measurement of insulin secretion in a potential diabetic is important because:

A) an increase in insulin indicates the onset of hypoglycemia and the presence of advanced glycation end products.
B) increased insulin leads to retinopathy,nephropathy,and neuropathy.
C) a decrease in insulin will cause overstimulation of the GLUT4 transporter and low blood glucose.
D) a decrease in glucose-stimulated insulin secretion is the first functional abnormality in both types of diabetes.