Glucose Metabolism Is Profoundly Affected During Pregnancy Because

Glucose metabolism is profoundly affected during pregnancy because:

A) pancreatic function in the islets of Langerhans is affected by pregnancy.
B) the pregnant woman uses glucose at a more rapid rate than the nonpregnant woman.
C) the pregnant woman increases her dietary intake significantly.
D) placental hormones are antagonistic to insulin, thus resulting in insulin resistance.