4. why did south carolina secede from the union?

When the ordinance was adopted on December 20, 1860, South Carolina became the first slave state in the south to declare that it had seceded from the United States. ... The declaration also claims that secession was declared as a result of the refusal of free states to enforce the Fugitive Slave Acts.

Explanation:

Lincoln's election

Explanation: Hope this helps :)

c- companies fail to take environmental protection into account. i think

answer; presidential election years;