The initial reaction of the United States to World War II was to maintain neutrality. (Option A)
The name of the group of nations that opposed the United States in WWII is Allies. (Option A).
The Axis powers at the expense of other countries invaded other nations to expand theirs. (Option D)
The Axis Powers were made up of Germany, Italy, and Japan. They accepted the dominance of Germany over most of Europe, Italy over the Mediterranean sea; and Japan over East Asia and the Pacific.
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