It’s either A or D but i’m leaning more towards A
Answer:
With its triumph in the Mexican-American War, the United States seemingly realized its Manifest Destiny by gaining an immense domain, including present-day Arizona, California, western Colorado, Nevada, New Mexico, Texas, and Utah.
Explanation:
Slave states: Delaware, Maryland, Virginia, North Carolina, South Carolina, Kentucky, Tennessee, Georgia, Florida, Alabama, Mississippi, Louisiana, Arkansas, Missouri, Texas
Free States: Maine, New Hampshire, Vermont, Connecticut, Rhode Island, New Jersey, New York, Massachusetts, Pennsylvania, Ohio, Indiana, Michigan, Illinois, Wisconsin, Minnesota, Iowa, California, Oregon
Almost all of these states were decided based on the Missouri Compromise creating a clear line of North v. South.