Which tributary of the Volta forms a long international boundary between Ghana and Côte d'Ivoire before entering Upper West?

Answer and explanation

Correct answer: A. The Black Volta (Mouhoun)

  1. Step 1: The Black Volta flows north then turns south along the border between Ghana and Côte d'Ivoire. Step 2. Bui Hydroelectric Dam is constructed across the Black Volta gorge. Answer: The Black Volta (Mouhoun). Why not the others: White Volta originates in Burkina Faso and flows through north-central Ghana; Red Volta is a small northern tributary; Oti enters from Togo.

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