What were the primary assumptions behind the signing of Executive Order 9066?

Executive Order 9066 was based on the wartime assumption that people of Japanese ancestry might be loyal to Japan, even when they were U.S. citizens born in the United States. This led to the forced removal and incarceration of Japanese Americans. Choice B is too narrow, and choice C contradicts the suspicion that was applied to people of Japanese heritage regardless of birthplace.

AI-written and checked against the verified answer.