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Which pair of circumstances represents an accurate cause-and-effect relationship?

A) more jobs in factories-->migration of African Americans from the South to northern cities.

B) Dred Scott decision--> passage of the Fugitive Slave Law.

C) closing of the frontier--> completion of the transcontinental railroad.

D) establishment of Jim Crow laws--> beginning of Reconstruction



Sagot :

More jobs in factories—> migration of African Americans from the south to northern cities