Why was president Polk willing to go to war with Mexico

to further the idea of Manifest Destiny

Explanation:

Manifest Destiny was simply the belief that God has destined the U.S., especially the white Anglo-Saxon race within the U.S., to expand to and rule the North American continent.

This term was used in the the 1840s, especially by James Knox Polk who was the 11th president of the U.S. between 1845 and 1849, as a justification for the war with Mexico.

the answer is the letter b governor of new mexico territory

"the attempts of the proletariat to rise above this abasement"