Need this quick!

In 1823, how did President Monroe halt the spread of European imperialism in Latin American nations?

A. He adopted a policy that supported "speaking softly and carrying a big stick."

B. He declared war on foreign nations that would not leave Latin America.

C. He strengthened control of Latin American countries by the United States.

D. He prohibited foreign nations from establishing colonies in the Americas?

The correct answer is D) He prohibited foreign nations from establishing colonies in the Americas

Explanation:

President Monroe is most remembered for his famous Monroe Doctrine. This Doctrine was based on the belief that the 'Western Hemisphere' and the Americas in general should be under the sphere of influence of the United States.

For the coming decades, it became a paramount part of the United States Latin American policy. The country made sure that no new colonies could be established in Latin America by European Powers. It also made sure that all countries in Latin America were close allies of the United States.

Any country that was 'hostile' to the interests of the United States, had to face-off proxy wars supported by the US.