What did the US acquire in Gadsden Purchase of 1853 Northern California and Oregon Southern Arizona part New Mexico Utah Nevada Colorado?

The correct answer is Southern Arizona part New Mexico.

The Gadsden Purchase was an agreement between the United States and Mexico, finalized in 1853, in which the United States agreed to pay Mexico $10 million for a 29,670-square-mile (76,800 km2) tract of land in present-day southern Arizona and New Mexico. The land acquired in the Gadsden Purchase was seen as necessary for the construction of a transcontinental railroad.