The map shows Africa and the surrounding oceans and seas, with historic kingdoms shown as colored in areas. Dots for cities appear both within and outside the kingdoms. A series of dots runs from north to south along the coast of the Indian Ocean, the eastern edge of Africa. Lines representing trade routes crisscross the continent from city to city in a network. On the western part of the continent, several trade routes run northward from Songhai through the Sahara desert to North Africa. On the eastern part of the continent, a single main route runs north south on the Indian Ocean near the coast, touching land along the way at cities such as Mogadishu. © 2012 The Exploration Company Based on the map, what can be said about the difference between trade from Songhai and trade from Mogadishu (on the eastern coast)? (5 points) a There was a lower volume of trade coming in and out of Mogadishu than at Songhai. b At Songhai, gold was the major export, while at Mogadishu slaves and ivory were. c Trade at Songhai was done by Muslims, while trade at Mogadishu was done by Hindus. d Trade from Songhai was done by land, while trade in Mogadishu was done by boat.