An athlete thinks that she can exercise as long as she eats different types of food because her body just needs different types of food molecules to work properly. Is the athlete correct? a
Yes, her cells only work when they have molecules from different types of food.
Yes, her cells only work when they have molecules from different types of food.

b
No, her muscles do not need molecules from food because all cells make all the molecules they need.
No, her muscles do not need molecules from food because all cells make all the molecules they need.

c
No, all cells need molecules from food and molecules from air to work properly.
No, all cells need molecules from food and molecules from air to work properly.

d
No, only her stomach cells need food molecules to work properly.