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Based on the map, the heaviest concentration of industry in the United States in the mid-1800s was in

the Midwest.
the West.
the Northeast.
coastal cities.

Based on the map the heaviest concentration of industry in the United States in the mid1800s was in the Midwest the West the Northeast coastal cities class=

Respuesta :

Northeast is your answer young lad
Northeast would it be
Q&A Education