Which countries did the United States fight against during World War II?

The correct answer highlights the main adversaries of the United States during World War II: Japan, Germany, and Italy. These three nations formed the Axis Powers, which opposed the Allies, a coalition that included the United States, the United Kingdom, the Soviet Union, and others.

Japan engaged in extensive military action across Asia and the Pacific, notably attacking Pearl Harbor in 1941, which led to the U.S. formally entering the war. Germany, led by Adolf Hitler, was responsible for the invasion of multiple European countries and the instigation of widespread conflict. Italy, under Mussolini, was also part of the Axis Powers and played a significant role in the Mediterranean conflict.

The other options do not accurately list the countries the U.S. fought against during this critical period. France, while initially under German occupation, was not an enemy of the U.S. during the war. China was actually part of the Allies fighting against Japan. Austria, though it was part of Nazi Germany after the annexation in 1938, was not a separate belligerent. Thus, Japan, Germany, and Italy are the correct adversaries recognized in the context of U.S. involvement in World War II.