Which domestic shift most affected the demographic makeup of northern us cities in the early 1900s?
a.
migration of african americans from southern farms to northern factories
b.
influx of illegal immigrants from mexico and central america
c.
discovery of large coal deposits in some midwestern states
d.
us acquisition of puerto rico and the philippines after the spanish-american war
e.
us victory over mexico in the mexican-american war

A.  migration of African Americans from southern farms to northern factories.

Explanation:

African Americans wanted to escape poverty, lack of opportunities and discrimination in the South. Industralization and growing urbanization in the northern states gave them new opportunities and hopes of a better life.

a. competition between france and england for land and power

either b) they were often feared and despised by other native cultures. or

c) their obsession allowed them to coexist with many other native cultures because of their peaceful nature.