I would have to say that the correct answer is Cooking
A will be the answer because usually marking your exercise days will become a habit because lets say you would do a running exercise but you want to do it in a certain day well if you mark it on the calendar, it'll become a habit.
(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 :(
