Examine Map 6-4 in Your Textbook

Examine Map 6-4 in your textbook .How does the history of cotton cultivation help explain southern black residency patterns in 1850?

A) As cotton cultivation expanded to the Deep South, most of the laborers became African American.
B) As cotton cultivation expanded to the Upper South, most of the laborers became free blacks.
C) As cotton cultivation receded in the Deep South, slave numbers decreased in comparison to those of the white population.
D) The domestic slave trade transferred slaves from the U.S.to Canada.