Answer:
Option: d) Plantations of the Southern colonies needed a large labor supply to work the land all year.
Explanation:
The transatlantic slave trade is a triangular trade where African men, women and children were shipped to North America to work in the fields in the South. Slaves were captured from Africa and sold to work in plantations to grow cash crops. Slaves were able to work for long hours in harsh climate conditions. They were cheaper than indentured labours and could work for long hours because of their physical structure in fields.