How did the american society change in the 1920s

Which events are correlated but do not necessarily have a causal relationship?

In what primary way did the goals for us intervention in europe differ from those of the soviet union

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.