What problems may arise as a result of large numbers of migrant African Americans
coming into the northern cities??

Although most northern states had abolished slavery by 1830, black residents of northern cities still faced considerable racial discrimination. They lived in the poorest and unhealthiest neighborhoods of cities, barred from all employment except menial labor and periodically harassed by white mobs.

Explanation:

c

the articles of confederation placed most of the power on the feds