Roosevelt Corollary is the U.S. foreign policy which is closely related to the Monroe Doctrine.
As the policy name implies, the "Roosevelt Corollary" was created under President Roosevelt reign while the "Monroe Doctrine" was created under the President Monroe.
Monroe Doctrine states that European countries should stay out of Latin America while Roosevelt Corollary extended this doctrine and states U.S. had the right to exercise military force to keep European countries out.
Hence, the Roosevelt Corollary is the U.S. foreign policy which is closely related to the Monroe Doctrine.
Therefore, the Option B is correct.
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