Answer: D) intervening in Latin American countries that could not pay their debt to European creditors.
Explanation: The Roosevelt Corollary (1904) to the Monroe Doctrine called for intervening in Latin American countries that could not pay their debt to European creditors. The Monroe Doctrine (1823) had pledged to keep European nations from intervening in Latin America, but as the countries there struggled economically in the late 19th and early 20th centuries, the U.S. offered to help them rather than let Europe invest there. This was a bigger issue as the U.S. became involved in the Panama Canal project in the early 1900s.
