Answer:
The Northern Colonies relied on free systems of labor, in which people were not subjected to any restrictions to their personal liberty. This made the labor market more dynamic.
The Colonies of the Tidewater region, specially Virgnia, relied on indentured servants: a labor system that consisted in bringing European settlers to work for free for a few years, until they could pay off their trip expenses.
Finally, the Southern Colonies, specially South Carolina and Georgia, relied on the slavery of African Americans, which was not a new labor system at all, but that underwent some changes in the colonial period, related to the scale and commercialization of the enslaved labor.
C and D are the best answers out of the bunch
