Answer:
The correct answer is - It named the coordinates of the Oregon Territory.
Step-by-step explanation:
The term Fifty - four - forty is a very famous term during the 1850s, it was the latitude line of 54 degrees, 40 minutes of the northern boundary of Oregon. In the early 1840s, no one knew exactly about the location of Oregon country.
"Fifty-four forty or fight!" is the term or slogan that means that the United States would accept nothing less than all of the Oregon Country that they believed at latitude line of 54 degrees, 40 minutes, as far north as the border of Alaska. This slogan was the campaign slogan of Polk that helped to victory against all odds.