Which factor contributed the MOST to the growth of cities in the late 19th century in the United States? A) improvements to steamboat technology B) expansion of railroads into western territories C) practical usage of alternating electric current D) the lure of new, high-paying, high-skill manufacturing jobs

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the answer is d because of more factory jobs for the lower class durring the industrial revolution

The answer is d they needed thoses jobs and it helped alot.

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