How many calories of energy will 20 grams of carbohydrates provide if 1 gram provides 4 calories?

A. 80 calories
B. 100 calories
C. 200 calories
D. 240 calories

Respuesta :

20 grams at 4 calories per gram.
20*4=80 Calories.
20* 4 =80 

so A is your answer.