Answer: C. previously undiscovered precious metals in the new territories .
Explanation: In the land that the U.S. acquired from Mexico, there were a lot of minerals siches such as gold, copper, and silver.
The Mexican-American war is a conflict between US and Mexico from 1846 to 48. Following the annexation of texas into the US
Hence the option C is correct, previously undiscovered metals in the new territory.
Learn more about the Mexican-American War that resulted in the U.S. as land acquisition.
brainly.com/question/18862289.