Concept:After seizing Borno, Rabeh's greatest problem was repairing the badly damaged economy of his new state.
Explanation:Rabeh conquered Borno in
1893, but he inherited a kingdom ruined by years of civil war and foreign invasions.
Farms were abandoned, markets collapsed, and the trans-Saharan trade that once supported Borno had declined sharply.
He did not need to rebuild the armed forces because his army was already strong and well organized.
He also kept his distance from the Sokoto Caliphate because he saw himself as an independent Muslim reformer.
His main task, therefore, was to revive the ailing economy so that peace and prosperity could return to the region.
Restoring economic activity was vital for securing the loyalty of his new subjects and strengthening his authority.
Answer:C. reviving the ailing economy.