A 200-pound person has a daily total energy expenditure of 25 kcal/pound fat-free mass. After losing 20 pounds on a diet, which of the following best represents the total daily energy expenditure of this person?

a. 20 kcal/pound fat-free mass
b. 30 kcal/pound fat-free mass
c. 10 kcal/pound fat-free mass
d. 25 kcal/pound fat-free mass