Which Best Describes the Absorption of Proteins

Which best describes the absorption of proteins?

A) Only amino acids enter the mucosal cell.
B) Only tripeptides enter the mucosal cells,but these are broken down into amino acids before entering the blood stream.
C) Only dipepetides and amino acids enter the mucosal cell;both typically enter the blood stream.
D) Tripeptides,dipeptides and amino acids enter the mucosal cell,but normally only amino acids enter the blood.