Under the Terms of the Oregon Treaty of 1846,
A) $\degree$

Under the terms of the Oregon Treaty of 1846,

A) the Columbia River was established as Oregon's northernmost boundary.
B) Great Britain accepted President Polk's demand for a boundary at 54 $\degree$ 40'.
C) the United States and Great Britain agreed to a twenty-year joint occupation of the Oregon Country.
D) Great Britain accepted the American-suggested compromise of the 49th parallel as the boundary between American and British claims to the Oregon Country.