What is one way a company can work to build relationships with it's customers?
A. A company can call all of its customers once a week to check in and see how their lives are going.
B. A company can plant to have a large sale once a year as a "thank you" to its customers.
C. A company can send a generic form letter to its customers to offer them a coupon
D. A company can send a personalized email to its customer when letting them know about a sale.