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.

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.  

the answer your looking for is c. : )