The neutrality acts of 1935 and 1937 were intended to:
a) enforce the policies of the league of nations
b) stimulate economic growth in the united states
c) avoid the policies that drew the nation into world war i
d) support the use of peacekeeping troops in europe

I believe your answer is C.
For A, we were never in the League of Nations in the first place, so why would we want to enforce any policies related to it?
For B, this is was in no way to stimulate the economic growth of the US. That's is the obviously wrong answer.
For D, The Neutrality Acts wanted nothing to do with the war. It didn't care if they be any peacekeeping troops in Europe. It supported to keep the US out of the war, and that's all.