By definition, any coping strategy will help you cope with stress at least temporarily. An ineffective strategy will not yield a long term positive outcome and may cause harm to self or others
The role of a coping strategy is to make one more calm, put-together and relieved. There are five kinds of them: Releasing the bad emotions, distracting oneself, management of dark thoughts and feelings, meditating and using certain kinds of relaxation.
a, because exercise doesn't just aid the prevention of certain diseases, it helps prevent many diseases. i would've chosen d if it wasn't so specific but a is the correct answer.
