The correct answer is D) were a potential threat to the security of the United States.
Japanese-Americans living on the West Coast of the United States in early 1942 were sent to internment camps on the alleged grounds that they were a potential threat to the security of the United States.
After the Japanese attack over the navy base on Pearl Harbor, Hawaii in December 1941, United States President Franklin D. Roosevelt signed executive order 9066, ordering the creation of interim camps for Japanese-Americans
One of those interim camps was Manzanar, in California.
From the end of 1942 to 1945, almost 118,000 people were sent to these camps because the federal government believed that these Japanese people were a potential threat to the security of the United States. They lived under poor conditions and the lack of opportunities to grow and prosper.