Final answer:
The U.S. invoked the B. Roosevelt Corollary, which allowed intervention in Latin America to maintain stability and protect American interests, when intervening in the Mexican Revolution.
Step-by-step explanation:
The United States was invoking the principle of the Roosevelt Corollary when intervening in the Mexican Revolution. The Roosevelt Corollary, an extension of the Monroe Doctrine articulated by President Theodore Roosevelt, permitted the U.S. to act as an international police power in Latin America. The principle stated that the United States would intervene in the affairs of Latin American countries to maintain stability and order, particularly if there was a risk of European interference or if there were threats to American interests.
This policy justified American interventions in Latin countries, citing prevention of European influence and the need to restore financial and political stability as reasons. The corollary gave the U.S. a broad mandate to intervene whenever U.S. officials deemed it necessary to assist these nations, often in ways that protected American business interests and ensured the repayment of European and American bank loans.