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.
Answer:
b. to convince people that the German government was unrepresentative of its people.
IF there is multiple choice let me know it would really help.
however i believe this is called tax reform
Sickness was a big thing brought from there as we were not used to there sicknesses and we were not used to there's it's a lot like the Aztecs and the Spanish the Spanish brought small pocks