Which statement best summarizes the United States policy in Latin
America in the 20th century? *
A. The "Big Stick" policy was repealed.
B. The main goals of the US has been to bring about the unification of Latin American nations
C. The United States has actively supported European involvement in Latin American affairs.
D. The US has intervened in Latin American Affairs when US self-interest has been involved

D. The US has intervened in Latin American Affairs when US self-interest has been involved

Explanation:

In the 20th century, US policy towards Latin America shifted from the Monroe doctrine that demanded that European powers not attempt to colonize any more Latin American states to a policy that demanded that US interests be protected in Latin America. Under President T. Roosevelt, the US decided that they would expand it's commercial interests into Latin America to enable it to control and protect the continent further as well as to assert it's will.

For instance, when in 1903, Columbia refused to grant US permission to build the Pans Canal, the US reacted by supporting Panamanian rebels through back channels and preventing Columbia from retaking Panama when the latter declared independence. The Panamanian government then responded in gratitude by allowing a canal to be built.

Another instance was the Mexican Revolutions occuring from 1910 to 1920 where the US would support any new Mexican government so long as they abided by US foreign policy.

congress failed to remove johnson. but it did succeed in getting control of efforts to re-build the south following america's civil war. radical republicans wanted to punish the south for starting the war. they also wanted to be sure new governments in the southern states would support the republican party.

explanation:

cause they can