72. A solution of starch at room temperature does not readily decompose to form a solution of simple sugars because ____.
(A) starch hydrolysis is nonspontaneous
(B) starch cannot be hydrolyzed in the presence of so much water
(C) the activation energy barrier for this reaction cannot be surmounted
(D) the hydrolysis of starch to sugar is endergonic
(E) the starch solution has less free energy than the sugar solution