Kirk Wilkins renewed his cell phone contract with Zip Wireless Services and purchased a new cell phone through the Zip Web site. If Kirk mails Zip Wireless Services his transaction receipt, he would be eligible to receive $50 as cash refund. Which of the following types of sales promotion is evident here?
A) point-of-purchase promotion
B) advertising specialty
C) premium
D) price pack
E) rebate
Answer: E) rebate