Answer:
D. They were self-employed
Explanation:
The history of the slave trade is widely known through the trans-Atlantic slave trade involving the Europeans mainly the Portuguese, Spanish, British, French, and Dutch capturing Africans and sell them to the New World plantation.
This trading of slaves commonly began around the late 15th century and lasted till around the 19th century.
However, most slave traders are self-employed and were aided by some of the West Africans who helped in capturing slaves to sell for European goods.
