JAMB - History (2019 - No. 22)
... was the only significant imperial power in the Northern half of Africa at the end of the 18th century
Ottoman Turkey
Italo-Egyptian Empire
Ottoman-Egyptian
Portuguese Empire
Explicação
Ottoman Turkey is the correct answer. Its dependencies in Egypt, Tripoli, Tunis and Algiers were admittedly almost self-governing, but they did at least contribute some revenue to the sultans in Istanbul.