According to the passage, which statement below correctly describes the economy of Ghana?

(A) The king of Ghana’s subjects are engaged in salt mining. (B) The Ghanians raised cattle for meat and hides. (C) The king of Ghana taxed salt and copper imports and exports. (D) The Ghanians had a self-sufficient farming economy.Explanation: The passage refers to the king levying dinars and mithqals on loads of salt and copper. The reference to salt (A) explains that it is imported. Cattle were located in Malal, not in Ghana (B). Ghanians grew vegetables, but the passage indicates that it was enough to be self-sufficient (D).