Which of the Following Is a Disadvantage of Bounce-Back Coupons

Which of the following is a disadvantage of bounce-back coupons?

A) They do not attract nonusers of a particular brand.
B) They are redeemable on the purchase of a different product.
C) They do not induce customers to repurchase the brand.
D) They are not useful for a brand that has reached the maturity stage.
E) They are not useful for products that are in the early phases of their lifecycle.