In Contrast to Their Counterparts in West Africa, the Fur

In contrast to their counterparts in West Africa, the Fur and Funj federations between Lake Chad and the Nile ____________

A) Were only partially converted to Islam, particularly in their ruling and merchant classes.
B) Were fully converted to Islam, from the royal clans down to the commoners.
C) Smelted and forged metals like copper, iron, and steel.
D) Preferred the title "Christian emperor" to the title "sultan".