Respuesta :

Answer:

The North developed economically much more than the South in the first half of the 19th century. Slavery was quickly abolished and the economy reverted to the rising industry to such an extent that during the Civil War about 80% of the industry in the USA was in the North.

Explanation:

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The main result of the changing economy during the mid-1800s was that Factories became more common in the North.

What brought the changing economy?

The industrial revolution played a role as its shifted jobs from the farm to the factory in the mid-1800s.

Hence, the main result of the changing economy during the mid-1800s was that Factories became more common in the North.

Therefore, the Option B is correct.

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