As a Sales Promotion Tactic, Why Do Marketers Prefer Using

As a sales promotion tactic, why do marketers prefer using rebates?

A) because customers often fail to redeem them
B) because they offer the customer a chance to actually try the product
C) because they offer incentives that encourage satisfied customers to become repeat customers
D) because they are most effective on everyday purchases
E) because they are easy for the customer to use