The statements that true is C. Salt was so valuable in Ghana that it was Worth in Gold
Many said that the Ghana empire was rich by handling the trade of Salt and Gold. There are no record about option A and option B.
And Option D. is definitely wrong because the Ghana Empire use Silent Trading, the trading occurred without the traders seeing each other face
They bought there freedom
Explanation:
The answer is letter B. Imperialism
The believed in the equality of all people and wanted to replace competition with coordination in the industry.
It became popular because of its texture and luster discovered by the empress)