About 15,000-12,000 years ago, people first entered North America. How did they get here? Select all correct answers. A coming down the coastline from Asia to South America by boat crossing the Bering Land Bridge when a corridor opened through the ice people most likely came across the Atlantic Ocean from Africa on large ships evidence has been found that people crossed glaciers riding on mammoths

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.