Answer:
B. Using different exercises, one after another for set periods of time.
Explanation:
I majored in Health
You could say something along the lines of:
"Hey, Friend, what's so good about weed? Why are you always smoking it?"
If he's smoking it for medical purposes, then just drop it, but if it's illegal and he's doing it to "look cool", then I would further ask questions about it.
The stress is coming from the daily activity