The Soviet Union was one of the key Allied nations during World War II. Italy, Germany, and Japan were part of the Axis powers. Thus, the correct answer is B. Soviet Union. ;
The Soviet Union was one of the principal Allied nations during World War II, helping to defeat the Axis powers, particularly after its invasion by Germany. Italy, Germany, and Japan were part of the Axis powers, making them opposing forces. Therefore, the correct answer is B. Soviet Union.
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