Which statement incorrectly describes a difference between north and south after 1820?

a. the north had a broader industrial base.

b. the south had more miles of railroad track.

c. the north had a larger white population.

d. the south had a larger black population.

Which options most accurately assess the impact of transportation improvements (e.g., railroads, canals, steamboats, transcontinental railroad) on the settlement of the west? ***(select all that apply.)*** a. they led to an increase in population density. b. they made it easier to travel long distances. c. they in establishing towns. d. they led to the development of the fur trade. e. they allowed for international travel.