Final answer:
Option (A), The Monroe Doctrine stated that the U.S. would not interfere in European affairs but did not limit itself from intervening in Latin American affairs or expanding into Mexican territory.
Step-by-step explanation:
The Monroe Doctrine, articulated in President James Monroe's annual message to Congress in 1823, was a cornerstone policy of U.S. foreign relations, asserting a clear stance against European colonialism in the Americas. Secretary of State John Quincy Adams played a key role in shaping the doctrine, emphasizing the United States' commitment to non-intervention in European affairs while declaring that European intervention in the newly independent states of the Western Hemisphere would be viewed as acts of aggression toward the U.S. This doctrine also implied that the U.S. would not interfere in existing European colonies.
Answering the student's question, the Monroe Doctrine also asserted that the United States would not interfere in European affairs (A). It did not, however, promise non-intervention in Latin American affairs (B), oppose European expansion in the Pacific (C), or limit U.S. expansion into Mexican territory (D).