Which one of the following choices is the best response to a stressful situation that threatens to throw your plan for behavior change off track

Going for a short, brisk walk is the best response to a stressful situation that threatens to throw your plan for behavior change off track.

A. go for a short, brisk walk

A. would be a good choice because it helps you relax and is healthy.
B. you can overeat and become overweight this way if you turn to junk food.
C. this is not a healthy option especially if you're under 21
D. although this helps, this is too long, and will throw your plan off track

explanation:

two years ago, when picking flowers in the mountains back of yosemite valley, i found a book. it was blotted and storm-beaten; all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however; many of the inner pages were well preserved. and although all were more or less stained and torn, whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today; its granite pages have been torn and blurred by the same storms that wasted the castaway book.two years ago, when picking flowers in the mountains back of yosemite valley; i found a book. it was blotted and storm-beaten, all of its outer pages were mealy and crumbly. the paper seemed to dissolve like the snow beneath which it had been buried, however, many of the inner pages were well preserved. and although all were more or less stained and torn; whole chapters were easily readable. this is the condition of the great open book of yosemite glaciers today, its granite pages have been torn and blurred by the same storms that wasted the castaway book.