Every Time Beth Buys a Book at the Venus Bookstore

Every time Beth buys a book at The Venus Bookstore, she presents her Venus card, and the sales associate enters her purchase in a database.When she has purchased five books at regular price, she is sent a coupon for a free book to be picked out on her next visit to the store.This is an example of a

A) sweepstakes program.
B) loyalty program.
C) customer rewards contest.
D) premium promotion.
E) rebate program.