Which of the following doctrines reinforced the United States' tendency toward isolationism in the early 1800s?

Question

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The Monroe Doctrine, announced in 1823, declared that any attempt by European nations to colonize or interfere with the affairs of independent nations in the Western Hemisphere would be viewed as a hostile act by the United States. This reinforced the United States' tendency toward isolationism and non-involvement in European affairs, as it sought to establish its dominance in the Western Hemisphere and prevent European influence in the region.

Which of the Following Doctrines Reinforced the United States' Tendency