Hello to answer your question fully.
<span>C. the right to vote
Signed by,</span>
Frequent Answerer Sargedog
Slavery was incredibly divisive because the Us was expanding into the west, and each new state had to decide whether it was going to be "slave" or "free", so there was no middle ground in terms of how the extension of slavery would unfold. This led to the Civil War.
Companies sell stock so they can raise capital.
So the company can afford new equipment, developing new markets, etc..
Answer: The purpose of the footnote to paragraph 4 is that It provides an additional fact related to the Civil War.