How can you maintain the values for the delivery reminder levels of a purchase order item? Note: There are 3 correct answers 
to this question.
A.  Enter a purchasing value key in the material master record. 
B.  Maintain a purchasing value key in customizing for the 
material group.
C.  Maintain a purchasing value key in customizing for the 
purchasing group. 
D.  Enter single reminder periods manually in the purchase 
order item. 
E.  Enter single reminder periods manually in the material 
master record.