Which statement best describes the role of gold in ghana’s wealth and power?

a.
gold provided a form of currency that could be used to buy iron for weapons.

b.
salt could be mined and then traded for gold to make ghanaian jewelry.

c.
gold and salt were used to buy ships that could be used for trade across the mediterranean.

d.
gold could be traded for salt, which was used to preserve food and maintain health.