The answer is the first choice.
Answer:
Sep 30, 2019 — The Louisiana Purchase stretched from the Mississippi River to the ... the defining themes of 19th-century American history, but it is not just the ... in the United States, the western frontier offered the possibility of independence and upward mobility for all. ... Westward Expansion and the Compromise of 1850.
D) start their own colony
The battle resulted in the almost complete destruction of the Russian Second Army, I looked it up
The Wilmot Proviso proposed an American law to ban slavery,
