Why were the Japanese imprisoned in American during WWII?

The attack on Pearl Harbor also launched a rash of fear about national security, especially on the West Coast. In February 1942, just two months later, President Roosevelt, as commander-in-chief, issued Executive Order 9066 that resulted in the internment of Japanese Americans

Explanation:

the correct answer option is: weapons.

explanation:

tensions rose as the two opposing superpowers competed for 'weapons'.

referring to the cold war (1945-1991), the two superpowers, usa and ussr, experienced a phase of struggle and conflict with each other. these two superpowers considered each other as a threat to their survival and thus opted for policies to strengthen their positions.

the two superpowers never went to war with each other directly but competed for weapons to preserve their positions.