The correct choice is:
Indentured servants.
The headrights system allowed planters to be given 50 acres of land for every person they payed for to come over.
Step-by-step explanation:
Indentured Servants in Colonial Virginia. Indentured slaves were men and women who engaged a promise (also known as an indenture or a covenant) by which they accepted to work for a certain number of years in the market for transferring to Virginia and, once they reached, food, clothes, and shelter.