The african sahel probably did not become a corridor of communication comparable to the eurasian steppe because of its

Here were the choices on that question:

a. poverty

b. lack of adequate rivers

c. mountains

d. richness

The answer is D. richness. Based on A Companion to World History, the African Sahel can be a corridor of communication between Nile and Niger valleys but did not materialize. The reason was the richness of Sahel that it that it can provide for itself even without trade.