In 1840s the area that the United State's acquire was Mexico ceded California as a part of a peace treaty.
The correct answer is Option D
Explanation:
"Treaty of Guadalupe Hidalgo" also known as the peace treaty was signed on 2nd February 1848 was a friendship agreement between America and Mexican republic government. Due to this treaty or agreement the "Mexican-American War" finished and this treaty forced or pressurized the Mexican government to cede California to the United States.
C.) Great Britain ceded the Oregon Country to the United States to settle a dispute over boundaries.
Explanation:
After the civil war the expansion of the American territory began, in the decade of 1840 the Oregon Treaty was signed whose name is the "Treaty with Great Britain regarding the western limits of the Rocky Mountains" and the border between British and American sections of the "Oregon Territory". This had been occupied by the British and Americans since the Anglo-American convention of 1818 when it was accepted in the common domain of the region.
The treaty was negotiated by James Buchanan, the US Secretary of State and Richard Pakenham, the royal council member of Queen Victoria and special envoy of the queen.
