What are the Smallest Projections of the Small Intestine Wall

Question

What are the smallest projections of the small intestine wall?  
A) Microvilli
B) Cilia
C) Villi
D) Brush border cells
E) Duodena

Accepted Answer

Microvilli are the smallest projections on the epithelial cells of the small intestine, significantly increasing the surface area for absorption.