The correct answer is D. You can visit this link for more info about the Monroe doctrine: https://www.ourdocuments.gov/doc.php?flash=false&doc=23
Some historians view the Middle Ages in a more positive light, as an age of faith.(A)
The Monroe Doctrine was a United States policy of opposing European colonialism in the Americas beginning in 1823. ... By the end of the 19th century, Monroe's declaration was seen as a defining moment in the foreign policy of the United States and one of its longest-standing tenets.