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 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? (4 points) Group of answer choices

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 product

Information about how the product benefits the environment