Which was the usual payment from the slave ship captains for the captured africans?

Land grants in the colonies

Explanation:

Slave ships were vessels that crossed the Atlantic, transported goods to exchange on the African continent for men and women from the African continent to the European colonies in the new world, and products such as sugar and coffee, among many others, to the European continent

The captains of the slave ships considered the slaves as a cargo to be transported to America in the fastest and cheapest way possible, and then sold for slave labor in coffee, tobacco, cocoa, sugar, and cotton plantations in the gold mines and silver, rice fields, construction industry, wood cutting and as domestic servants. These captains were paid for a land grant in the colonies, which made the slave trade very profitable for them.

i believe your answer is d)