A patient has been eating healthy foods, but his digestive system is not doing what it usually does. Can this patient still exercise normally? A. Yes, as long as he can still breathe, his cells will have all the molecules they need to release energy.

B. No, his digestive system is not breaking down oxygen into molecules small enough to get inside his cells.

C. No, molecules from food are not combining together to be large enough for his cells to use.

D. No, molecules from food are not getting broken down small enough to get inside his cells.