Why Do Some Marketers Offer Rebates Instead of Price Reductions

Why do some marketers offer rebates instead of price reductions to induce short-term sales?

A) Rebates have a much higher redemption rate than coupons.
B) A price reduction of this type would have likely been an example of price discrimination.
C) Rebates offer a more immediate reward than price reductions.
D) Rebates are especially good at enticing purchases,but most consumers never bother to redeem them.