C. Poorly; his digestive system is not breaking down molecules from food into glucose.
Explanation:
From the available diagram, it can be seen that the man has a high molecule of starch in both his mouth and small intestine. With the molecules of glucose lower in both mouth and small intestine.
These suggest that his digestive system is not breaking down molecules from food into glucose.
Therefore, in an exercise, he is expected to perform poorly.
When you are stressed you can often become lazy. You start to eat and you either don't stop because it makes you feel better or you just sit and never get up. This also is the case for break ups not just death. This can lead to mental heath issues to including depression.