In 1600s the planter class increasingly relied on African slaves for labor majorly because slaves were offering cheap labor now that the planters didn't have to pay for this form of labor. This led to most of them foregoing traditional indentured servants who would be paid for their labor and instead opted for African slaves.
I believe the answer is B) personal history
It reduced the need for slaves,and was a much quicker process.
Hmmm I remember my teacher explaining this to me it’s just that I don’t remember but I’ll think about it and then I can help you :)