Although not officially referred to as chief: It is likely Metacom or Metacomet (King Philip). He famously pushed back European colonists out of New England (King Philip's War).
One way in which the Kingdom of Ghana facilitated the gold trade was by trading gold with slaves and other indentured workers. Most of this trading was done with other African nations but some with Europeans.
Outlining, because your essay is based on the claim you come up with
Answer:
I think its A not really sure tho