Based on the fact that Charleston Mercury was a southern sympathizer, the editor most likely chooses the name "War of Southern Independence" for the US Civil War.
Answer:
it blew up because of terroists
Explanation:
(1) The United States wouldn't interfere in the internal affairs of or the wars between European powers; (2) The United States wouldn't interfere with existing colonies and dependencies in the Western Hemisphere; (3) The Western Hemisphere was closed to future colonization; (4) Any attempt by a European power to oppress or control any nation in the Western Hemisphere would be viewed as a hostile act against the United States.
The idea that O'Sullivan describes in this quotation is A) manifest destiny. Manifest Destiny was an idea that O'Sullivan was responsible for popularizing in the 1800s. This political theory or ideology sought for the United States to expand its borders to the Pacific Coast based upon a god given right to expansion which he called Manifest Destiny.