Which demographic trend occurred in the South between the founding of the country and Reconstruction?
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(A) Fewer people lived in the South than the North due to large numbers of immigrants going to the North.

(B) More people lived in the South than the North due to agricultural techniques that led to increased food production.

(C) More people moved to the South than the North due to increased employment opportunities in factories.

(D) More people lived in the South due to expanding cities because of the invention of the skyscraper.