The answer is D. Weak men and those with a prejudice towards Europe. Because in Paragraph 3 explains it . Hope it helps 
 
        
                    
             
        
        
        
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With the growing threat of being relocated, they adopted the "white man" ways. Several ways they did this was by building houses, making an alphabet, building schools and churches, and making a Constituition (based off the Constitution of the US). Ultimately, it all went in vain; they got relocated anyways because President Andrew Jackson pass the Indian Removal Act.
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 ANSWER:
Crusades, military expeditions, beginning in the late 11th century, that were organized by western European Christians in response to centuries of Muslim wars of expansion. Their objectives were to check the spread of Islam, to retake control of the Holy Land in the eastern Mediterranean, to conquer pagan areas, and to recapture formerly Christian territories;