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Why did the United States enter World War II?

美国为什么加入第二次世界大战？

官方列出的全部答案（4 个）All official answers (4)

(Bombing of) Pearl Harbor
Japanese attacked Pearl Harbor
To support the Allied Powers (England, France, and Russia)
To oppose the Axis Powers (Germany, Italy, and Japan)

官方题目：移民局 M-1778 (09/25)，第 15 页Official question: USCIS M-1778 (09/25), page 15 移民局官方题目 PDFUSCIS official PDF