C) The bells change from controlled to panicked
        
             
        
        
        
The predicate is  researches , because it is an subject 
        
                    
             
        
        
        
Affected would be your answer...affected means something attacked the body...effected means it did not attack the body...just showed symptons
        
             
        
        
        
Answer:
That they have done so for their own sake
Explanation: