Answer: I think it is C or B
Explanation:
A medium of exchange allows greater efficenency in an economy and also stimulates a rise in overall trading activity. In a barter system, trade between two groups or people can only happen if one party has something the other party really really wants.
They provided the framework that kept states together and the basis for a stronger government
Answer: Middle Passage of the triangular trade
The transportation of slaves from Africa to America was known as the Middle Passage of the triangular trade.
Explanation: