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.
His intelligence, wit, and style made him one of France's greatest writers and philosophers, despite the controversy he attracted. he was an outspoken supporter of social reform. (including defense of civil liberties, freedom of religion, and free trade).He was a prolific writer and produced works in almost every literary form (plays, poetry, novels, essays, historical and scientific works)
I believe the answer is B.
c. Prussia unified Germany into one nation in 1971.