Humans Can Digest Starch but Not Cellulose Because ________

Multiple Choice

Humans can digest starch but not cellulose because ________.

A) humans have enzymes that can hydrolyze the α-glycosidic linkages of starch but not the β-glycosidic linkages of cellulose
B) starch monomers are joined by covalent bonds, and cellulose monomers are joined by ionic bonds
C) the monomer of starch is glucose, while the monomer of cellulose is galactose
D) Starch is softer than cellulose