Which of the following Nigeria rivers provides the longest distance of internal waterways?

The Benue River provides the longest distance of internal waterways in Nigeria. The Benue River is the largest tributary of the River Niger and is approximately 1,400 kilometers long. It flows from the Adamawa Plateau in northeastern Nigeria and flows westward through the country, eventually joining the River Niger at Lokoja. The Benue River is navigable for approximately 500 kilometers from its mouth, and its navigability provides a significant transportation route for goods and people in Nigeria. The waterway is used for transportation of goods such as agricultural produce, petroleum products, and other goods. It also serves as a source of water for irrigation, fishing, and hydroelectric power generation.