Question

The expansion of the continental United States was made complete by
A. the Louisiana Purchase
B. the annexation of Texas.
C. the Mexican Cession.
D. the Gadsden Purchase.
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Answer 1

Answer:

I think the Louisiana Purchase

hope this helped

Answer 2

Answer:

Treaty of Guadalupe Hidalgo

Explanation:

The Treaty of Guadalupe Hidalgo, signed by chief negotiator Nicholas P. Trist on February 2, 1848, and approved by the U.S. Senate on March 10, 1848, ended the war, opened a dramatically different chapter in U.S. relations with Mexico, and nearly completed America's continental empire.