Concept:The River Niger Basin Commission refers to the Niger Basin Authority, which is an intergovernmental organisation of countries sharing the Niger River.
Explanation:The Niger Basin Authority currently comprises
9 member countries from West and Central Africa.
These countries are Benin, Burkina Faso, Cameroon, Chad, Ivory Coast, Guinea, Mali, Niger, and Nigeria.
Together, these nations cooperate on the sustainable development and management of the Niger River basin.
Answer:D.
9