Answer: I think the answer is A), please tell me if i am wrong.
The answer is D. He placed family members in charge of regions.
The land of Zhou was a vassal state of the Shang Dynasty. A powerful leader of the Zhou named Wen Wang began to plan to overthrow the Shang Dynasty. The Zhou Dynasty was divided up into the Western Zhou and Eastern Zhou periods. It extended its power over the eastern plain by granting authority to members of the royal family and in some cases to favored adherents, that established walled forts supported by garrison troops among the original habitants of the east.
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