Which addition to the Monroe Doctrine asserted that the United States would intervene in Latin America to stabilize economic affairs?

• A. Open Door Policy
• B. Dollar Diplomacy
• C. Roosevelt Corollary
• D. League of Nations

Answer: (C)

The idea being tested is how the United States expanded its role in Latin America by claiming the right to intervene in order to stabilize economies and protect American interests. The Roosevelt Corollary to the Monroe Doctrine announced that the United States would use military force to prevent European powers from intervening in Latin American affairs and to stabilize disorder or financial crises that threatened regional stability. In practice, this meant the U.S. could intervene in countries with debt problems, political instability, or economic mismanagement to maintain order and safeguard American investments, sometimes sending troops or directing fiscal measures to keep governments solvent.

This is why it’s the best answer: it explicitly links U.S. intervention in Latin America to stabilizing economic affairs, extending the original Monroe Doctrine’s stance beyond European interference to a policy of policing the hemisphere to preserve economic and political order.

The other options don’t fit this precise idea. The Open Door Policy was about equal trading rights in China, not Latin America. Dollar Diplomacy focused on using economic power and loans to influence foreign governments, but it didn’t formalize a principle of U.S. police power to intervene militarily to stabilize economies. The League of Nations is a post–World War I international organization aimed at collective security, not a unilateral policy about Latin American intervention to stabilize economies.