What was the monroe doctrine? a trade agreement between the united states and mexico.
b military treaty between spain and mexico
c pact between the united states and mexico to ward off european invaders
d document and policy aimed at preventing european involvement in the americas

D document and policy aimed at preventing European involvement in the americas

Explanation:

The Monroe Doctrine, famously known for its words "America for the Americans" was a document and a policy taken by the government of the UNited States, where the government of the United States offered to not interfere on any European affairs and would leave the existent colonies of the european powers at ease, as long as the European countries won´t continue to conquer the territories left in the american continent.

thurgood marshall

explanation: in 1954, thurgood marshall and a team of naacp attorneys won brown v. board of education of topeka, kansas. in this landmark decision, the supreme court held that segregation in public education violated the equal protection clause of the fourteenth amendment.

after defeating german forces in north africa allied leaders turned their attention to "italy," since this was the location that made the most geographic sense before invading northern europe via france.