Answer: principle of self-government is necessary for maintaining good health because it takes a great amount of discipline to stay healthy. It keeps your heart and lungs healthy.
Explanation:
(i'm gonna try to give more reason cause my last comment was deleted)
i think it may be D because that would be the only one to make sense
it wouldn't be A because how would changing their behavior help physical impairments? (it wouldn't)
i don't think it would be B because how could that help..
i don't think it would be C because medication does not help with those kinds of problems, i think,
hope this helps :)
sorry if im wrong :(
I believe the answer is A
