Sullivan is suggesting that the united states a) will not be truly free without abolition. b) must have a social revolution to become great. c) is meant to expand across the continent and become extraordinary. d) is a nation built on historically successful political practices, guaranteed to succeed.

Columnist John L. Sullivan explained in his "Manifest Destiny" essay that the United States' mission was to spread "the great experiment of liberty" - or republican democracy - all across North America.

He sought this move as a strategy to disregard Great Britain's claims to the territory of the state of Oregon. According to the writer's believes, manifest destiny was a higher law that was above all international laws and pacts, one that could allow the country to reach new highs and become extraordinary. .  

Therefore, the answer is option C) is meant to expand across the continent and become extraordinary.

b. 155 enlisted men and no officers