Why did the constitution provide for a system of checks and balances?

What is one way scalawags were significant during the reconstruction in the south?

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.

Which piece of information would most a historian create an interpretation of this photograph of works in a factory?