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Based on the information on the map, <span>Population levels in the Midwest made it difficult to support the amount of labor required to industrialize. The answer is D. </span>
I would say that Plessy v. Ferguson contributed to the Civil Rights movement. This was a court case that ruled that racial segregation in schools was allowed as long as the education for black students was equal to white students. Although this does not seem like a civil rights act, it later lead to Brown v. Board of Education, which ended racial segregation in schools all together.
