All of the Following Factors Contributed to the Legalization of Slavery

All of the following factors contributed to the legalization of slavery in Virginia in the second half of the seventeenth century EXCEPT

A) English colonists began to enslave large numbers of Native Americans for the first time in the wake of Bacon's Rebellion.
B) birth rates in England began to decline which helped to make the people of England less inclined to indenture themselves as servants in America.
C) high death rates in the first half of the seventeenth century had left the colony of Virginia in relatively short supply of laborers.
D) planters' need for workers to clear forests and cultivate crops continued to grow.