Question

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? Information about product testing in a study that includes a control group A lack of testimony from users who have used the product for several months Pictures comparing loads of laundry cleaned with and without the prod