Much of what we know about the shang dynasty is due to the discoveries of a. astronomers b. archeologists c. explorers

B.  Archaeologists

Astronomers have nothing to do with discoveries on earth. explorers could accidentally stumble upon something but then archaeologists would start to dig there.

during the ming dynasty

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."