Which of the Following Reasons Best Explains Why Starch Molecules

Which of the following reasons best explains why starch molecules must be broken down before they can be absorbed by the small intestine?

A) They are toxic to the cells of the small intestine.
B) They are too large to pass through the plasma membrane of the intestinal cells.
C) They must be broken down in order to extract the essential amino acids they contain.
D) The cells of the small intestine are much too small to contain them.