Lucy and Marcy Are Sorority Sisters Whose Heights, Weights, and Ages

Lucy and Marcy are sorority sisters whose heights, weights, and ages are almost exactly the same. Lucy is studying engineering and walks several times a week for exercise. Marcy is an exercise physiology major who aspires to be a professional tennis player, and runs marathons as a hobby. How would you expect their healthful diets to differ?

A) Lucy needs more calories and less carbohydrate than Marcy
B) Lucy needs fewer calories and more protein than Marcy
C) Marcy needs more calories and more carbohydrate than Lucy
D) Marcy needs less carbohydrate and more protein than Lucy