What was the main effect of poll taxes and literacy tests put in place in the south at the end of the 19th century?

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.

Brainliestttme : ) what are trading blocs and what is the impact of international cooperation?

Which economic sector employs the least number of people in mexico, barbados, and venezuela? a. agriculture b. services c. industry