Which of the Following Statements Describes a Limitation Associated with Using

Which of the following statements describes a limitation associated with using coupons as sales promotional tools?

A) Coupons offer price reductions only to those consumers who are price sensitive.
B) Coupons are often used by consumers who are already loyal to the brand.
C) Coupons for established brands or products are not redeemed.
D) Coupons can encourage trial and repeat purchase of a brand.
E) All of above statements describe limitations associated with using coupons as sales promotional tools.