Which of the Following Statements Concerning Carbohydrate Use as an Energy

Which of the following statements concerning carbohydrate use as an energy source is FALSE?

A) it supplies about 40 percent of the body's energy at rest
B) it is the main fuel during exercise of high intensity
C) most athletes should consume large amounts just prior to performance for quick energy
D) intake during performance may help to prolong endurance capacity in very prolonged events
E) the major source of carbohydrate energy during exercise is muscle glycogen and a well-fed athlete will have enough for over an hour of exercise