Answer:
B.
optimism
Explanation:
That's the answer on Edge
When you exercise, your body produces something called endorphins (it's sort of like morphine), and it makes your body feel less pain and make you feel more happy. In this case, the endorphins combat your stress and make you feel better mentally.
He is able to express himself and exercises more. That’s why he’s happy.
It might because it happens so often.
It would be C. Unused vitamin A is stored in fat cells of the body.
