The Louisiana Purchase, which was purchased by the United States from France, greatly impacted the development of the US in that it gave the US a large area of land for extremely cheap.
Answer:
The Mexican Cession (Spanish: Cesión mexicana) is the region in the modern-day southwestern United States that Mexico ceded to the U.S. in the Treaty of Guadalupe Hidalgo in 1848 after the Mexican–American War
In the decline of Swedish influence and the emergence of Russia as a mojor power in that region
I haven’t done this in a long time so don’t hold me set on this but if i remember right then it’s between B and D
