How does the louisiana territory relate to the westward movement?

It Doubled the size of the United States, added 14 states to the Union, and greatly expanded the United States boundaries.

Explanation:

Before the Louisiana Purchase the Boundaries fro the United States were not past the Appalachian MountainsThomas Jefferson negotiated a treaty with France in which the United States paid France $15 million for the Louisiana Territory – 828,000 square miles of land west of the Mississippi River – effectively doubling the size of the young nation.

it was the shinto. the answer is c.