Definition: You are given a question on US foreign policy. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: The foreign policy doctrine that European nations should stay out of Latin America is known as
(A)the Powell Doctrine. (B)the Roosevelt Doctrine. (C)the Bush Doctrine. (D)the Monroe Doctrine.

D