Can someone summarize this in 2 sentences
Will give brainliest to the best summary

The approval of is the states was needed to ratify the constitution

Which factor has played the most important role in changing the way history is studied over time?

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.