1. B. Achieving peace with Mexico.
After the United States had won the Mexican-American War (1846-48), both countries signed the Treaty of Guadalupe Hidalgo, on February 2, 1848, as a treaty of peace.
2. C. Mexico ceded California to the United States as part of a peace treaty.
Such peace treaty is known as the Treaty of Guadalupe Hidalgo. According to the treaty, Mexico recognized the Rio Grande as America’s southern border and ceded to the U.S. a variety of lands that now are California, Arizona, Colorado, Nevada, New Mexico, Utah and Wyoming, for approximately $15 million.
3. B.Union States
During the Civil War, the Union consisted of the Northern states and the federal government. It included 20 free states, and Michigan, Minnesota, Iowa, and Oregan were part of them.
4. C. Political opportunities for African Americans disappeared after a short time.
During the reconstruction, political opportunities for African Americans disappeared after a short time, this was due to a variety of factors that led to a lack of political focus on the pursuit of their real freedom and equality, some of these factors included: The North was still divided about bringing the South back into the Union on equal footing, the Republican party was divided in its purposes as well, which led to sidetrack them from real progress; the emerge of hate organizations toward black people, the Supreme Court helped severely limit the rights of African Americans, the economic prosperity in the North that drew attention away from Reconstruction, etc.
