D, Roosevelt said that the United States would prevent Latin American countries from illegal actions. The statement said that the US would act as a police officer. So any options that talked about an actual, literal police force can be eliminated right away. Now, the third option, that Roosevelt wanted to bring Latin American criminals to the US for trial, that would not be acting like a police officer, that would be acting like a judge. And besides, prosecuting Latin American criminals would be infringing on the rights and laws of a sovereign nation, something which Roosevelt would have been dead set against. So, the final option is the only one that makes sense. Roosevelt was going to use the United States' foreign influence, along with political manipulation to set up puppet dictators and puppet governments to prevent illegal actions in Latin America.
