I'm pretty sure it was the horse bc native americans no longer traveled on foot for long distances. instead, they had the ability to travel using horses which was faster and more efficient
 
        
                    
             
        
        
        
Answer:
 In 1844, Congress finally agreed to annex Texas. On December 29, 1845, Texas entered the United States as a slave state, broadening the irrepressible differences in the United States over the issue of slavery and setting off the Mexican-American War.
Explanation:
 
        
                    
             
        
        
        
The correct answer is option A. 
The best summary of the development of capitalism and growing scrutiny of the system during the nineteenth century was that the capitalist system prospered by challenging the economic constraints of monopolies, but some residents accused it of creating income disparity.
 When capitalism first emerged, people were unaware of its mechanisms; however, as it gained popularity, it became clear how it had impacted the working classes and the elite itself.
Learn more about capitalism, here-
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