Question

What was one consequence of the U.S. annexation of Texas in 1845?
A.
more public interest in the United States acquiring Alaska
B.
decreased tension with Britain the led to better trade relations
C.
increased tension with Mexico that eventually led to war
D.
less public interest in the United States acquiring California
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Answer 1

C. Increased tension with Mexico that eventually led to war.

Explanation: Mexico still considered Texas part of its territory after Texas declared independence. U.S. annexation in 1845 intensified the border dispute (Rio Grande vs. Nueces River) and helped trigger the Mexican–American War (1846–1848).