How does the Monroe Doctrine demonstrate a shift from the traditional isolationism policy?

The Monroe Doctrine joined isolationism as a major part of United States foreign policy. It also told a hidden message. It told the world the United States wasn't weak group of states, but it had become a strong confident nation that was to be respected by the world.

Explanation:

the answer is b.

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the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.