Help me please What did James Polk’s campaign slogan “Fifty-Four Forty or Fight” mean?

A. American legislators estimated the nation needed 5,440 soldiers for a war with Britain.
B. The United States won ownership over Oregon from the British by a vote of 54 to 40.
C. Polk was willing to go to war over the Oregon border at 54 degrees latitude, 40 minutes.
D. The treaty over the Oregon territory expired in 54 years, but Polk wanted it to end in 40.

I think C

Explanation: The meaning of the slogan was that the US should go to war with Britain unless Britain gave the US the entire Oregon Territory. This issue ended with the boundary being set at the 49th parallel. "Fifty-Four Forty" refers to a line of latitude, an east-west running line marking a north-south boundary.

the best and most correct answer among the choices provided by the question is the second choice "less supportive to the war of 1812"

the war of 1812 was a military conflict that lasted from june 1812 to february 1815, fought between the united states of america and the united kingdom, its north american colonies, and its native american allies.

i hope my answer has come to your . god bless and have a nice day ahead!