Why did abraham lincoln’s election as president cause a secession crisis?

A former Whig, Lincoln ran on a political platform opposed to the expansion of slavery in the territories. His election served as the immediate impetus for the outbreak of the Civil War. After being sworn in as president, Lincoln refused to accept any resolution that would result in Southern secession from the Union.

Explanation:

lincoln presided over the union victory in the american civil war, which dominated his presidency. a former whig, lincoln ran on a political platform opposed to the expansion of slavery in the territories. his election served as the immediate impetus for the outbreak of the american civil war.

i also think it is c