Epithelial Cells of the Small Intestine Contain About 500 Microvilli

Epithelial cells of the small intestine contain about 500 microvilli.What is the purpose of these microvilli?

A) to increase surface area for food absorption
B) to beat and move food through the intestines
C) to contract and move food through the intestines
D) to release mucus that protects the intestines from infection
E) to release digestive enzymes