Question

 A valid conclusion based on the experience of Japanese Americans during World War II is that in wartime

1.first-generation immigrants become security risks
2.constitutional liberties may be limited
3.loyalty oaths are necessary to protect the national interests
4.fear and uncertainty do not interfere with normal life

Answer 1

It has to be number three. The American government was scared that the Japanese Americans would "betray" America.

Answer 2

It depends on the hidden premises and the context, but I would argue Option B is correct. During war, fear, patriotism and national security trump civil liberties - as bad as that may be. (Muslim Americans suffered the same fate after 911)