In the 1844 election, the phrase “Fifty-Four Forty or Fight!” referred to the number of representatives in Congress.
growing US economy in the West.
desired boundary line in the North.
threat of war with American Indians.

So the question ask on which of the following among the choices is the best answer that is referred by the phrase "Fifty-four Forty or Fight" in the election day and the best answer would be C. the desired boundary line in the North. I hope you are satisfied with my answer.

Sure hope this helps

8 years 100% positive

explanation:

the british they shot them