Final answer:
The Monroe Doctrine came first among the given options, followed by Theodore Roosevelt's extension known as the Roosevelt Corollary.
Step-by-step explanation:
The policy that came first among the given options is C) Monroe Doctrine. The Monroe Doctrine was established in 1823 and aimed to warn European nations against interfering in the affairs of Latin American countries. It declared that the United States would guarantee the independence of nations in the Western Hemisphere. Theodore Roosevelt later extended this policy with his Roosevelt Corollary, which asserted the right of America to intervene in Latin American nations as an 'international police power' to collect debts and prevent European involvement in the region.