How Did Americans Feel About Collective Security Toward the End

How did Americans feel about collective security toward the end of World War II?

A) They were eager to make new attempts at collective security.
B) They acknowledged that collective security was useful, but remained reluctant.
C) They still thought that isolationism was better than collective security.
D) They realized that collective security was ineffective, but it kept their alliances throughout the war.
E) They vowed never to make another attempt at collective security.