What factor differentiated indentured servants from slaves?

a) the educational level of the person and his or her master

b) the number of years the person worked for his or her master

c) the year the person was born

d) the religion of the person

  B) The number of years the person worked for his or her master.

Explanation:

  Indentured servitude was a system of unfree labor by which an employee is bound by a signed or forced contract to work for a particular employer for a fixed time.

  Indentured servants usually entered into that labor for a specific payment or other benefits. When the contract finished the servants were given their freedom, and occasionally plots of land.

  I hope this answer helps you.

answer; i believe the correct answer is enlightenment;