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.