Arun is researching a new grapefruit-and-avocado diet. He has found information about the doctor who came up with the diet program, three people currently on the diet, and a woman who lost 50 pounds in one month using the program. Which of these sources would most likely provide balance and credibility to the news report? A person for whom the grapefruit-and-avocado diet did not work Several people who belong to a dieting support group and are losing weight A doctor who runs a competitor's weight-loss management program Three people who plan to lose weight through extensive exercise