Answer :
The role of gold in Ghana's wealth and power is D. Gold could be traded for salt, which was used to preserve food and maintain health.
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The correct option is D
The yellow gold was exchanged for white gold, which was what the salt was called in the exchange. The gold was of sedimentary nature, from the basins of the Senegal and Niger rivers, then transformed into ingots between Ghana and Awdaghoust (Mauritania). The goods for which the ingots were paid were clothing, copper, paper, leather, ceramics, cauris - shells that in Antiquity served as a currency of payment -, wheat, dates and salt.