Which of the Following Is an Example of Consumer-Generated Marketing

Which of the following is an example of consumer-generated marketing?

A) Cristal, a jewelry store, uses its page on Facebook to provide information about its upcoming products to its customers.
B) Figa, a leading provider of athletic shoes, helps its customers customize their shoes on its Web site and choose personalized settings.
C) Fun & Run, a local amusement park, promotes its services by allowing consumers to upload videos and write reviews about the park.
D) Barton's, a local pet supply store, rewards frequent buyers with vouchers and exclusive offers.
E) Energix, a manufacturer of soft drinks, attracts customers through televised advertisements.