15 how did theodore roosevelt use the monroe doctrine in the twentieth century? 1.)to justify us involvement in latin america 2.)to argue against us involvement in latin america 3.)to justify us involvement in europe 4.)to argue against us involvement in europe

The best answer is 1)to justify US involvement in Latin America

Theodore used an argument known as the Corollary to the Monroe Doctrine, which established the United States not only as a guarantor of Europe staying out of Latin America, but also the right of the US to maintain heavy involvement in Latin American affairs. 

I would say the first one