In a magazine advertisement, a manufacturer claims its laundry ball, which contains ceramic pellets, gets clothes clean by changing the pH of the water. The ad claims the product reduces wear on their clothing, contaminants in the environment, and the cost of doing laundry. What should the advertisement include to give a consumer more confidence in this product's claims?
They should back up their claims with extensive product testing and they should reve a l the result s of the tests. They should also give a money-back guarantee if the laundry ball performs unsatisfactorially for the consumer.