How did the Monroe Doctrine affect expansion in the Western Hemisphere?

Question

It stated that the US would not tolerate European colonialism in the Western Hemisphere.
It stated that the US would be neutral toward European affairs in the Western Hemisphere.
It stated that the US would become allies with European colonies in the Western Hemisphere.
It stated that the US would begin to build colonies in other regions in the Western Hemisphere.

Answer 1

The correct statement about the Monroe Doctrine in relation to expansion in the Western Hemisphere is:

It stated that the US would not tolerate European colonialism in the Western Hemisphere.

The Monroe Doctrine, articulated in 1823 by President James Monroe, asserted that the Western Hemisphere was off-limits to new European colonization and warned that any intervention by foreign powers in the affairs of the Americas would be viewed as a hostile act against the United States. This doctrine effectively established a sphere of influence for the U.S. in the region, discouraging European intervention and allowing for American expansion and influence throughout the Western Hemisphere.