I believe it was because the government was afraid that they might be spies for Japan, so they thought it was safer to keep them in one place so it would be easier to keep an eye on them. It also stemmed from racism due to the attack on Pearl Harbor and the U.S. fighting against the Japanese in the Pacific.
By ending segration I think hope that helps :)
Answer:
I believe the answers are b. and d. in that order as well.
Explanation:
The Telegraphy was the first to send coded messages over a wire in a matter of seconds
