The correct answer to this open question is the following.
Although there are no options attached, we can say the following.
The result of the English opening the slave trade to any English merchant in 1698 was that the slave trade became an economic detonator and industry by its know.
In the 1640s, the Dutch had sent African slaves to the Island of Barbados, to work in the sugar plantations. So when the British realized that Africans could be exploited as slaves for the farm fields, they started to buy slaves and sell them in the North American colonies. From that time until 1807, historians consider that the English took almost 3 million African slaves to the Americas in what was called the slave trade, using the ports of Bristol, Liverpool, and London.
