which conclusion is best supported by the fact that the United States did not enter World War II until 1942

Question

a. US leaders did not believe that the events of the war justified involvement until 1942
b. Germany had not been involved in the World War II until 1942
c. no other nation asks for US help in the war effort until 1942

Answer 1

And your answer is?

Answer 2

B? Correct me if im worng