Answer: For example weight training you can push yourself and others to lift more and eating you could make it challenges to see who can eat the healthiest or make the most satisfying meal with the most healthiest ingredients.
Explanation:
The answer is D. Because stimulant in its definition stimulates something or increases it while a depressant decreases something
From my personal life I'd say B is what I have lived by since I started working out, I also think schools would say the same, I am not %100 sure but this is my input.