Question

The relocation of Japanese Americans from the

West Coast during World War II occurred because
(1) most of them were not citizens of the United
States
(2) they refused to serve in the United States
military
(3) they were needed to work at inland defense
industries
(4) military authorities considered them a threat
to national security

Answer 1

The correct answer is:
(4) military authorities considered them a threat to national security.

Many of them (around 60 percent) were born in the US and no longer had any contact to Japan, and some didn't even speak Japanese, yet they were considered a threat (unjustly).