What Is the Function of the Bicarbonate Ions Secreted by the Pancreas

What is the function of the bicarbonate ions secreted by the pancreas?

A) to prevent enzymes that digest carbohydrates and fats in the small intestines from becoming denatured
B) to stimulate the release of bile from the gallbladder
C) to stimulate secretion of the hormone secretin
D) to facilitate the transport of nutrients across the intestinal wall
E) All of these choices are correct.