Which of the following statements best supports American interest in isolationism?

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As Europe was at peace after World War I, Europeans did not want to interact with the rest of the world.

America was interested in decreasing its interests in both Latin America and Europe.

As Americans became more economically prosperous and independent, they did not want to continually police the world.

Americans encouraged communism and felt that isolationism would help this idea grow.

The statement that best supports American interest in isolationism is: "As Americans became more economically prosperous and independent, they did not want to continually police the world."

To determine the answer, we need to understand what isolationism is and then analyze each statement to see which aligns with the concept.

Isolationism is a foreign policy approach where a country seeks to limit its involvement in international affairs, avoiding alliances, and maintaining a focus on its domestic concerns.

Analyzing the statements:

1. "As Europe was at peace after World War I, Europeans did not want to interact with the rest of the world."
This statement suggests European sentiment but does not directly address American interests. It does not support American isolationism.

2. "America was interested in decreasing its interests in both Latin America and Europe."
This statement indicates American interest in reducing involvement in Latin America and Europe. It aligns with the idea of isolationism as it suggests a desire to withdraw from international engagements.

3. "As Americans became more economically prosperous and independent, they did not want to continually police the world."
This statement directly addresses American interests and supports isolationism. It highlights the desire for economic prosperity and independence, indicating a reluctance to engage in global policing or intervention.

4. "Americans encouraged communism and felt that isolationism would help this idea grow."
This statement does not align with American interests in isolationism. Encouraging communism is not a typical objective of isolationist policies.

Therefore, statement 3, "As Americans became more economically prosperous and independent, they did not want to continually police the world," best supports American interest in isolationism.