The involuntary relocation and enslavement of Africans by the Spanish and Portuguese became known as the

Columbian Exchange
Portuguese Revolution
Spanish Revolution
Transatlantic Slave Trade

i do believe its (d) it allowed the government to offer pioneers sixty acres of western land if they lived on it and made improvements to it.

explanation: signed into law in may 1862, the homestead act opened up settlement in the western united states, allowing any american, including freed slaves, to put in a claim for up to 160 free acres of federal land. by the end of the civil war, 15,000 homestead claims had been established, and more followed in the postwar years

the award is named for an american naval historian and theorist, rear admiral alfred thayer mahan, united states navy who, through his writing, provided stimulus and guidance to those who share in the defense of the nation.

ok i will try

explanation:

you didn't list the options. however, a few communist countries today are: the people's republic of china, north korea, and cuba.