The opinion of an expert can be very persuasive when put into advertising for a product. This is because the opinion of someone who understands the subject passes credibility on the efficiency and quality of the product and this can boost sales.
"Inserting an execution sentence" and "introducing an additional slogan" would not be important to persuade consumers and "using extraneous information" makes no sense apart from scaring potential buyers.
me personally would say D because the first dentist visit can be scary to little kids especially since its his first time and the reason behind why he has to go would be informational
