Answer: B
Indentured servants and slaves became an integral part of the agrarian plantation economy that developed in North carolina. Landowners needed labor to work in fields of rice, tobacco, indigo, and other crops. ... They did the difficult, backbreaking work in the fields that enabled the plantations to remain prosperous.
or
The idea of indentured servitude was born of a need for cheap labor. ... With passage to the Colonies expensive for all but the wealthy, the Virginia Company developed the system of indentured servitude to attract workers. Indentured servants became vital to the colonial economy.
Let me know if this helped!