Hi there!
The innovation that had the greatest impact on westward migration was d. transcontinental railroad.
        
                    
             
        
        
        
Answer:
I take a shower every day. 
You brush your hair every morning.  
She only dries her hear when it´s cold outside. 
We put on a tie only for formal meetings.  
They cut their hair every three months.  
Explanation:
Al conjugar verbos en presente simple para los sujetos “I”, “you”, “we” y “they”, se usa el infinitivo. En cambio, para las terceras personas (“he”, “she” y “it”,) se añade una letra “-s” al final del verbo,, aunque existen excepciones ortográficas en la tercera persona, dependiendo de la letra final del verbo, similar a la forma en que se construye el plural de los sustantivos.
 
        
             
        
        
        
Answer:
He said it was a terrible thing from Britain and should be abolished, although Jefferson didn't abolish it.
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Trade helped empires gain money, troops, slaves, food and relations with other empires