What was an essential key factor in the development of civilization during this period?

a. weapons and tools
b. papyrus
c. mercantilism
d. reliable trade networks

D. Reliable Trade Networks

Explanation:

An essential key factor in the development of civilization during this period was reliable trade networks.

zoom in on the bill of rights. the other side was just as divided: some antifederalists opposed the constitution only because it lacked a bill of rights, and others opposed it on other grounds and merely used the bill of rights as an excuse to campaign against it.