4. ____ If a total of 2000 kcal a day were consumed (260 grams from carbohydrate, 65 grams from fat, and 102 grams from protein), what percentage of energy comes from carbohydrate, fat，and protein? (A) 30% carbohydrate, 50% fat, and 20% protein (B) 50% carbohydrate, 30% fat, and 20% protein (C) 20% carbohydrate, 30% fat, and 50% protein (D) 52% carbohydrate, 30% fat, and 18% protein