A.information about the product testing in a study that includes a control group, because testing the product helps prove the company's claim. hope this helps
The correct answer is option a. Information about product testing in a study that includes a control group.
The experiments and the visible result creates a trust about the use of the product. The advertisement can include the observation of product testing, in which a control group should be present. In the control group, the product should not be used and in the experimental group the product should be used. A comparison of the control group and experimental group can help in observing the difference with and without use of the product.
