What event marked the beginning of the civil war?
a.
lincoln–douglas debates
c.
south carolina seceding
b.
lincoln inauguration
d.
fort sumter shelling

d. Fort Sumter shelling

Explanation:

The attack on the Federal base in the middle of Charleston harbor, Ft. Sumter, is largely seen as the start of the Civil War.

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the correct answer is :

{b.}   ( american workers lose job opportunities )

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