Answer:
The Correct Answer is A.
"The Oregon border".
Step-by-step explanation:
"Fifty-Four Forty or Fight!"
- This was one of Polk's campaign slogan.
- Many American wanted to own all of Oregon.
- This slogan referred to what the northern border would be.
- In the election of 1844 Polk wins over the clay, Polk believed in the manifest destiny and getting all of the Oregon.
- In 1846 United States and Great Britain agree to settle the border dispute at the 49th parallel.