Answer: The correct answer is : C. along the banks of the Niger River
Explanation: In the downstream direction, the Niger River bathes these cities: Bamako, Kulikoró, Segú, Yenné, Mopti, Timbuktu, Gao, Tillabéri, Niamey, Onitsha and Port Harcourt. It is the third longest river in Africa. In its population includes groups such as Bambara, Malinke, Songhai and Zarma.