The answer is C hope this helps
        
                    
             
        
        
        
Repetitious or Drab, Hope this helps!
        
             
        
        
        
I like trains..... VROOOOOOOOOOM
        
                    
             
        
        
        
Answer:
Here is something I would change 
Explanation:
Original: They are forced to sit in a chair for a certain amount of time and to quietly complete assignments.
My opinion: They are forced to sit in a chair for an exact amount of time and forced to sit quietly and finish assignments not knowing if they have to stay there after the bell rings.