Answer: D) Add a reality show contestant’s testimony about the joy of being on such a show.
If an author is writing on the joys of being in a reality show, adding a reality show contestant's testimony is the best way to strenghten his argument. A contestant will have a unique, personal perspective that is more likely to be taken seriously by readers. Moreover, this testimony is likely to include information that outsiders would never have the chance to acquire in any other way. Therefore, including the contestant's words will make the author's argument more persuasive.
