Building a commercial enterprise out of the wilderness required labor and lots of it. For much of the 1600s, the American colonies operated as agricultural economies, driven largely by indentured servitude. Most workers were poor, unemployed laborers from Europe who, like others, had traveled to North America for a new life. In exchange for their work, they received food and shelter, a rudimentary education and sometimes a trade.
By 1680, the British economy improved and more jobs became available in Britain. During this time, slavery had become a morally, legally and socially acceptable institution in the colonies. As the number of European laborers coming to the colonies dwindled, enslaving Africans became a commercial necessity and more widely acceptable.
Your correct answer is D.
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I believe Its the first one.
