The photograph below was taken in the United States in 1942: Image of several Japanese American students standing in a line with their belongings waiting to board a bus. (The photograph demonstrates Japanese Internment Camps)

Which of the following events prompted the action shown in the photograph in 1942?
the United States' rise of isolationist sentiments
the United States' decision to enter World War II
Japan's aggressive expansionism
Japan's attack on Pearl Harbor