Joe Is Eating a Peanut Butter and Jelly Sandwich on Whole-Wheat

Multiple Choice

Joe is eating a peanut butter and jelly sandwich on whole-wheat bread. The chemical digestion of what nutrient in his sandwich is started in his mouth?

A) The fat in the peanut butter
B) The fiber in the peanut butter
C) The vitamins in the bread
D) The starch in the bread
E) The protein in the bread and in the peanut butter