What reinforced isolationist sentiments against u. s. involvement in world war ii?

The correct answer is:

The findings of the Nye Committee.

The Nye Committee (1934 – 1936)  was under the command of the Republican U.S. Senator Gerald Nye. It was meant to examine the financial and banking interests involved in the United States' participation in World War I and was a meaningful influence in the public´s support for American neutrality in World War II.

i would say your answer is a)

sorry if im wrong