Why Do Endurance Athletes Practice "Carbohydrate Loading," Meaning to Eat

Multiple Choice

Why do endurance athletes practice "carbohydrate loading," meaning to eat massive amounts of starch in the days leading up to a long race?

A) Starch is used as a building block for the synthesis of many other molecules.
B) Carbohydrates are reduced molecules that can provide the chemical energy required during exercise.
C) Starch can be used to synthesize cellulose and build up the cell walls of muscles.
D) Starch provides dietary fiber or "roughage" that aids digestion.