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

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

Much African-American were brought to the American shores. They were brought from Slave Trade from the Europeans who were engaged in business with the African kingdoms.  The number grew when the African Americans have started to settle in the Northern part of the US during the Great Compromise.

explanation:

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the section of the chart that represents a point at which a bill needs approval from a majority of people in both chambers to advance is j, as this is the only section before the bill becomes law which has both rows (symbolizing the chambers) converging into one, meaning that the two parts of the congress have to approve of it before it can march on with the process.