The correct answer is 3) "conquered areas around the Nile River".
Sunni Ali was the first king of the Songhai Empire and ruled approximately from 1464 to 1492 which was the year of his death. The kingdom was located in Western Africa. During his reign, the empire saw important expansion. This included the annexing of the cities of Djenne and Timbuktu. Even though the co-existence of religions was not well seen at the time, he did rule over territories that practiced different beliefs and did not impose a certain belief over others.
However, his reign did not expand to Eastern Africa, where the Nile River is located.
