The correct option is A Hausa-Fulani
Hausa-Fulani people dominated Northern Nigeria. Hausa, people found chiefly in northwestern Nigeria and adjacent southern Niger. They constitute the largest ethnic group in the area, which also contains another large group, the Fulani, perhaps one-half of whom are settled among the Hausa as a ruling class. Northern Nigeria has long been dominated by the Muslim Hausa, since the 19th century.