Which area did the united states acquire in the 1840s, and how did it acquire the land?

a.) the united states purchased alaska from the british.

b.) thomas jefferson purchased the florida territory from spain.

c.) great britain ceded the oregon country to the united states to settle a dispute over boundaries.

d.) spain ceded the louisiana territory to the united states as part of a peace treaty.

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.  

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