The correct answer is C. i think
        
                    
             
        
        
        
C is the correct answer because in a title, you always want to capitalize the bigger and more describing words. 
Hope this helped!
        
                    
             
        
        
        
Answer:
3^4 x 3^-7
Step-by-step explanation:
 
        
                    
             
        
        
        
City C (42 and 66 are the two modes they are the most frequent numbers both appearing 3 times)