38. _________ Athletes who are going to be active for a long time often eat large amounts of carbohydrates before competing. The most beneficial carbohydrates come from vegetable sources such as wheat, corn, and beans. Sugars are also a form of carbohydrates, but the body uses them quickly and without much benefit.
(A) Carbohydrates give us energy.
(B) The most useful carbohydrates come from vegetables such as wheat and corn.
(C) Food is made up of carbohydrates, proteins, and fats.
(D) Our bodies need basically four types of nutrients from food: proteins, carbohydrates, fats, and vitamins and minerals.
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