Question

Who was President when Texas, the Oregon Territory, and the Mexican Cession were added to the United States?
A. John Tyler
B. James K. Polk
C. William Henry Harrison
D. Zachary Taylor

Answer 1

The Annexation of Texas, the Mexican-American War, and the Treaty of Guadalupe-Hidalgo, 1845–1848. During his tenure, U.S. President James K. Polk oversaw the greatest territorial expansion of the United States to date.

Answer is B hope i helped

Answer 2

C William Henry Harrison was president