What economic system was used by both the ancient Egyptians and ancient Mesopotamians, and made it easier for them to trade with each other?
barter system
system of taxation
command economy
gold-based currency

How did the invention of the cotton gin affect slave labor in the united states? a. there was a forced migration of slaves from the south to the north. b. slave-owning cotton planters were gradually forced to sell their plantations. c. more slaves were purchased to work on cotton plantations in the south. d. the reduced need for labor on cotton plantations led to a decline in slavery. e. slaves were moved from cotton plantations to sugar plantations.

The roman empire created the worlds first

Poland a: nato b: warsaw pact c: not a member of either alliance