If Green Giant Wants to Provide Its Resellers with a Secondary

If Green Giant wants to provide its resellers with a secondary incentive to stimulate repurchases after an initial consumer coupon campaign for its latest product, it can offer resellers a sum of money for each unit purchased. This type of sales promotion is a:

A) buying allowance.
B) count-and-recount allowance.
C) scan-back allowance.
D) buy-back allowance.
E) merchandise allowance.