Why were the Japanese Americans sent to an internment camp?

1. Their old neighborhoods were needed for a base camp.
2. Their old homes were unfit to live in.
3. The government was afraid they would threaten the war effort.
4. Their old homes were destroyed by a hurricane.

Would it be 4

3 answers

No. Please read your text and do not guess.
3 I meant...
Yes, 3.