Concept:The Kanem-Borno Empire grew strong through territorial expansion and the use of imported firearms and horses.
Explanation:The rulers of Kanem-Borno actively pursued a policy of military expansion.
They extended their authority over surrounding lands and trading routes.
To support this expansion, they developed a powerful cavalry force.
This cavalry relied on horses and firearms, which were obtained through trans-Saharan trade.
Control of trade routes also brought wealth and military advantage.
Therefore, the central policy of the empire was not about foreign rule, nomadic life, or land reforms.
Instead, it combined imperial conquest with the acquisition of modern weapons and horses.
This strategy helped the empire dominate the central Sudan region for many centuries.
Answer:B. imperial expansion and firearms trading