Nobles and knights were obliged to protect those who lived on the manor and provide personal and military service to the king.
 
        
                    
             
        
        
        
It <span>laid the foundations for the beginning of a modern global economy</span>
        
                    
             
        
        
        
Positive--resulted in the lowering of the voting age to 18, contributed to the end of the Vietnam War, contributed to furthering the civil rights movements of the time. 
Negative--they were violent and led to the deaths of many in riots and shootings, their means were not taken seriously by adults and conservatives of the time, 
        
                    
             
        
        
        
 the answer is D. north Africa.<span />
        
                    
             
        
        
        
Answer:
The Answer s C . Hope this was helpful.
Explanation: