PLEASE ANSWER ASAP what were some major continents that contributed in the slave trade.

Slavery was prevalent in many parts of Africa for many centuries before the beginning of the Atlantic slave trade. There is evidence that enslaved people from some parts of Africa were exported to states in Africa, Europe, and Asia prior to the European colonization of the Americas.

Explanation:

Answer Africa Asia Europe and all of the americas

Explanation:

answer:

d. because dr. laguardia selected a widely used measure, his study generalizes to has strong external validity. external validity has limited external validity. other applications of this measure.

the widely used measure that he applied to his experiment was the benton facial recognition test. it employed on to football players and as result, only players who suffered brain concussions did not pas this test. and although it has an external validity, it is limited because it isn't general to apply to other population.

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