The answer will beThe trade began due to a surplus of each product per area. Gold was plentiful in West Africa so traders sent the item to North Africa so they too could have the valuable mineral. In return, North Africans gave salt to West Africa. hope this helps
around the 9th century it wa discovered in Europe, still different time for different places
D the formation of political factions because he thought it would divide the country
So it dosent become a monarchy