An ad for Maybelline age-minimizing makeup in Ladies' Home Journal magazine featured actress Melina Kanakaredes and offered readers a $1-off coupon when they try the new makeup. In terms of the communication model, which of the following would be the best way for the source to measure feedback?
A) the number of subscribers to Ladies' Home Journal
B) the number of people who make up the target market
C) the number of people who redeem the coupon
D) the number of people who were exposed to the ad
E) the number of people to whom Melina Kanakaredes is an appealing spokesperson
Answer: C) the number of people who redeem the coupon