In 1845, the United States annexed the Republic of Florida.
California.
Texas.
Oregon.

Texas

Explanation:

The Annexation of Texas, the Mexican-American War, and the Treaty of Guadalupe-Hidalgo, 1845–1848.

The answer is Texas

Explanation:

The Texas annexation was the 1845 annexation of the Republic of Texas into the United States of America. Texas was admitted to the Union as the 28th state on December 29, 1845. Hope this helped :)

answer; ///i do believe that the correct answer is (d); ///athens had a small population;