Which of the following was TRUE about indentured servitude and slavery

Which of the following was TRUE about indentured servitude and slavery?

A) At the end of their terms, which ranged from 4 to 7 years, indentured servants were set free, while the status of slave was permanent unless freed by his or her owner.
B) Many Virginians initially preferred African slaves because they cost half as much as English indentured servants and had similar lifespans.
C) Slaves and indentured servants seldom intermarried and saw themselves as different, separate groups when they felt they were treated badly.
D) Indentured servants, unlike slaves, were rarely beaten and seldom bought and sold to other families or employers.

ANSWER
Answer: A