The answer is:
b. to influence.
Hope that helped
D: to stop smoking
So you can cross out a and b already because it starts with caps which wouldn’t make sense which leave you with c and d so you could narrow it down to which on would make sense in a complete sentence which is D.
Refusing to acknowledge something unpleasant is a way of coping with that thing. Saying something that’s unpleasant isn’t unpleasant or there, convinces them that it might make it actually go away,
Use synonyms to change it up