Setting goals could help in physical health , to help with being more healthy or even being more out there with people
Setting goals will help mental health because it would help u think of what’s more important for you
Setting an social health goal could help so your more social with friends and have good character
While you didn't really provide us with any possible goals which one might consider to be least or most realistic - What one shouldn't do if one wants to attain mental and emotional health is to set up healthy and achievable goals, that one doesn't expect too much from himself or that one can be able to say no to a request etc.
The answer should be B.
Hope it helped!