Which relation is not a function?
(A) Month       Profit
      Jan.          $150
      Feb.         $400
      Mar.          $430
(B) Month       Profit
      Jan.          $150
      Feb.          $400
      Mar.           $430
(C) Month       Profit
      Jan.           $150
      Feb.           $400
(D) Month       Profit 
      Jan.           $400
      Feb.    
      Mar.  
                                             
                                          
                                          
                                        
											 
			                  