When He First Heard About Giving a Customer a Reason

When he first heard about giving a customer a reason to come back, Marco thought he had to give the customer merchandise. He felt better when he learned:

A) giving them cash, such as a rebate, would be the best way.
B) discounting prices on an everyday basis would be best.
C) having a strong social media presence was what was needed.
D) building relationships and a friendly image would work best.