What affects the desirability of a product? products become more desirable when a. movie starsmovie stars use a product because consumers who use the same product may feel more fashionable. b. celebritiescelebrities use a product because consumers who use the same product may feel closer to famous people. c. professional athletesprofessional athletes use a product because consumers perceive them to be particularly knowledgeable about it. d. both a and b. e. all of the above.