Which was a major argument in favor of the Mexican War in 1846?

A.
Mexican forces had crossed the California border and killed hundreds of American civilians.

B.
Mexico claimed U.S. territory in Oregon and years of talks did not settle the issue.

C.
Northern abolitionists supported the war because Mexico had refused to outlaw slavery.

D.
Americans who believed in Manifest Destiny wanted to spread the American way of life.

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https://en.wikipedia.org/wiki/M

Question

Which was a major argument in favor of the Mexican War in 1846?  
 
 

 
 

  

  A. 
  Mexican forces had crossed the California border and killed hundreds of American civilians.   
   

 
 

  

  B. 
  Mexico claimed U.S. territory in Oregon and years of talks did not settle the issue.   
   

 
 

  

  C. 
  Northern abolitionists supported the war because Mexico had refused to outlaw slavery.   
   

 
 

  

  D. 
  Americans who believed in Manifest Destiny wanted to spread the American way of life.  

Read This
   https://en.wikipedia.org/wiki/M