A gym equipment manufacturer encourages customers to become members of the firm's Web site. Membership provides customers with exercise tips as well as discounts on gym equipment and workout apparel. This is an example of $\_\_\_\_\_\_\_\_.33)\_\_\_\_\_\_$ A$)$ a club marketing program B$)$ the selling concept C$)$ consumer$-$generated marketing D$)$ a frequency marketing program E$)$ a basic customer relationship