What drove the significant change in the slave trade between 1450 and 1750?

O European Societies stopped the practice of exíling prisoners to their colonial territories.

O Competition from agricultural communities of
indigenous people increased colonial plantation
owners' demand for enslaved laborers.
O It was less profitable for colonial plantation owners to
use indentured servants to grow cash crops.
O Triangular trade encouraged a direct and profitable
exchange between North America and Africa, in which
enslaved people were traded for agricultural goods.

d.prevent the spread of communism outside of eastern europe.

during the 20th century, the role of the vice president has evolved into more of an executive branch position. now, the vice president is usually seen as an integral part of a president's administration and presides over the senate only on ceremonial occasions or when a tie-breaking vote may be needed.

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.