Answer:
B: Take a more active role in European affairs.
Explanation:
This is what I found on the internet. Plz rate my answer if its helpful:
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.
