Stress.
Explanation:
Stress can cause aging, grey hair, weight gain and more. Therefor the stress going on in your mind is affecting your body
Cecilia's is the healthiest because she is able to find a middle ground in a conflict and is reasonable in doing so. Also, she tries to find the root of the problem instead of just trying to get her way.
I would say it is A. Because they are going to comply with the new rules that were given, but are still being exposed to where children would want to smoke and be tempted. Plus, process of elimination. D. can't be it because it says nothing about cigarettes being stolen. C. can't be it either because a display case EXPOSES cigarettes. And B. can't be it because they are still being exposed to it.
Hope it helps.
