How did the war of 1812 contribute to an increase in u. s. manufacturing? a) the war provided more resources for factories to increase production. b) the war promoted trade between countries so that americans could focus on fighting. c) the war cut americans off from their previous supply of imported manufactured goods. d) the war limited transportation in america, making it necessary to import manufactured goods.

The correct answer is C. The war cut Americans off from their previous supply of imported manufactured goods. The Americans had to make their own manufactured goods due to the imports cut off. This led to an increase in American manufacturing.  More factories were built as efficient machines were invented. With machines that could mass-produce and a plethora of workers. Factories could now produce much more than they could have before.

the answers is b.   environments.

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