Answer:
It is either B or D
I know for sure it is not A or C.
Sorry if I am no help. ಠ╭╮ಠ
Explanation:
The assembly line allowed Ford to sell them cheaper, t made work much faster taking less money to make a car.
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Based on the information on the map, <span>Population levels in the Midwest made it difficult to support the amount of labor required to industrialize. The answer is D. </span>