After the civil war, the united states A. remaied basically unchanged
B. was very slow to recover
C. was growing rapidly
D. none of the choices are correct

C

Explanation:

Several industries grew following the civil war. This was due to a rising population, abundant natural resources, manufacturing development, and technological innovation. Following the war the United States utilized its rising population including tens of thousands of new immigrants along with its abundant natural resources to develop its industries which led to an economic boom.

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The answer is C

Explanation:

not concrete, existing in thought or as an idea but not having a physical or concrete existence

i could of w this question but i don't see a " passage " .

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sorry ! ):