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.