B. "To assist the president in descision making." Is the correct answer.
Because the colonists took the land owned by the American Indians
Some of the most valuable commodities that moved through the kingdom of Ghana between the 5th and 15th Century were Gold and Salt during the Trans-Haran trade. The beginning of Trans-Haran gold trade is linked to the Soninke Empire of Ghana in the 5th Century. While the consumption of Trans-Haran salt was promoted for trade purposes. Berbers from the North of Africa were able to cross the Sahara desert using camels with their caravans with gold sort from western and central Sudan. This linked the Mediterranean economies which demanded gold and in return they supplied salt.
