What was one significant result of the changes in manufacturing and transportation that took place in the first half of the nineteenth century?

As manufacturing expanded in the first half of the nineteenth century, factories needed more workers, and improved transportation made it easier for people to move to growing industrial cities. Many people traveled north seeking factory jobs, contributing to overcrowding in cities. The correct choice is “Cities became overcrowded as more and more people traveled to the North, looking for factory work.”

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