What initiative did Americans take to benefit the war effort during World War II?

Americans created bomb shelters in case of a land attack by the Japanese.
Americans trusted those of Japanese origin to help in the war effort.
Americans of different ethnicities put aside their differences.
Americans helped by gathering essential items for war production.

I think it is number 2

4 answers

Definitely not 2.

"What initiative … " means what did Americans DO to benefit the war effort.
okay so it would be 1
Nope. The military did that, and besides that would have helped only those living on the west coast.

That's two wrong guesses. You should have no trouble deciding now, but please don't post about this again.
The answer is the 4th one, just took the test and it was right.