Which of the following events represents the most significant turning point in U.S.foreign policy?

Question

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Participation in World War II marked a significant turning point in U.S. foreign policy as it led to the emergence of the U.S. as a superpower and global leader. It also set the stage for the Cold War and the U.S.'s role in the world during the latter half of the 20th century. While the other events listed (World War I, Vietnam War, fall of the Soviet Union) were all significant in their own right, none had the same breadth or magnitude of impact on U.S. foreign policy as World War II.

Which of the Following Events Represents the Most Significant Turning