Which of the Following Applies to the Small Intestine

Multiple Choice

Which of the following applies to the small intestine?

A) It is where foodstuffs first encounter protein-splitting enzymes.
B) Its walls secrete most of the digestive enzymes that are active in its lumen.
C) It is where carbohydrates and fats but not proteins are digested.
D) Breakdown products of fats enter its lacteals.