Which of the following statements is an opinion?
a.
slavery was the most important cause of the civil war.
b.
south carolina seceded from the union in 1860.
c.
abraham lincoln won the 1860 presidential election.
d.
abolitionists were found in both the north and the south.

the answer is A because it says "the most important" which is an opinionated statement

Slavery was the most important cause of the Civil War

Explanation:

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explanation:

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