5. explain how we know that ancient civilizations knew of and were concerned about infectious diseases

What is the definition of double v campaign

What was america's response to the holocaust before the war? what could the us have done differently?

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.