When Proteins Are Used as a Source of Energy for the Body

When proteins are used as a source of energy for the body, the proteins

A) are converted into glucose molecules, which are fed into glycolysis.
B) are converted mainly into intermediates of glycolysis or the citric acid cycle.
C) donate electrons directly to the electron transport chain.
D) are hydrolyzed to glucose and converted to acetyl CoA, which enters the citric acid cycle.