Which of the following lakes is the largest lake in Africa, the world's second-largest freshwater lake, approximately 6,800 square miles large, and crossed by the Equator?

Lake Victoria is the largest lake in Africa, is crossed by the Equator, and is commonly described as the world’s second-largest freshwater lake by surface area. The area in the question appears to be misstated: Lake Victoria covers about 26,600 square miles, not 6,800. Lake Tanganyika is the tempting alternative, but it is not the largest lake in Africa.

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