Which of the Following Is an Example of Post-Purchase Communication

Which of the following is an example of post-purchase communication?

A) An airline hires an actor to film a series of humorous commercials touting the airline's service.
B) An insurance company designs a new "umbrella" logo to indicate that its customers are well-protected by coverage.
C) A fast-food restaurant issues standardized uniforms for all its employees.
D) A hotel sends an email survey to a Henri a week after his stay,asking him to comment on the quality of the service he received.
E) An income tax preparer offers a 20% discount for any customers who use the service in January.