The slogan “Fifty-Four Forty or Fight!” was about "American possession of all of the Oregon Country"
What is "Fifty-Four Forty or Fight!" ?
The northern boundary of Oregon was the latitude line of 54 degrees, 40 minutes. "Fifty-four forty or fight!" was the popular slogan that led Polk to victory against all odds. John Mix Stanley. Oregon City, along the banks of the Willamette River, the final stop along the Oregon Trail as it appeared in 1848.
Why the Americans want to control Oregon country?
Many Americans wanted to be able to get to the Pacific Ocean. One way to do this would be to control Oregon. In 1819, the United States and Spain signed the Adams-Onís Treaty. With this treaty, Spain gave up its lands in the Oregon Country.
Hence, option A is correct.
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