Final answer:
The Monroe Doctrine, issued in 1823 by President James Monroe, declared that the Americas must stay free from European interference, opposing any new European colonization in the Western Hemisphere.
C is correct
Step-by-step explanation:
In 1823, President James Monroe issued what became known as the Monroe Doctrine, which is a statement that the Americas C. Must stay free from European interference. This doctrine was a significant declaration of U.S. foreign policy, asserting that future European colonization would not be welcome in the Western Hemisphere. It also stated that the political systems of the Americas and Europe were inherently different, and thus, neither should meddle in the affairs of the other.
Secretary of State John Quincy Adams played a key role in shaping this doctrine, which was intended to deter European nations from engaging in political activity within the independent nations of the Americas. Despite its bold assertion, the U.S. at the time was not fully equipped to enforce the Monroe Doctrine against European powers, should they choose to challenge it.