The correct answer to this open question is the following.
What caused West Africans to transition from controlling the exchange of goods to European slave raiders was the fact that European powers such as Great Britain, Spain, or Portugal directly competed to acquire the control of the slave trade of African people.
Everything started with John Hawkins, considered to be the first European slave trader in 1562. Years later the government of Englan granted charters to merchants and traders to open locations in West Africa where they could exploit the raw materials and natural resources such as ivory and gold. Because of this, England started to get more competition from other European nations such as Switzerland, the Dutch, and Denmark.
Vincent van Gogh<span>, </span>Paul Gauguin<span>, </span>Georges Seurat<span>, and </span><span>Paul Cézanne</span>
The answer is B because the rest involve later dates in U.S. History basically.
The Ghana Empire properly known as Wagadou ( Ghana being the title of its ruler) ,was a west African empire located in the area of present day southeastern Mauritian and western Mali .As the empire declined,it finally become a vassal of rising Mali empire at same point in the 13th century.