Scale Viewer, a Nutritional Food Manufacturer, Offers Various Products That

Scale Viewer, a nutritional food manufacturer, offers various products that assist weight loss. Consumers who successfully lose weight using its products are featured on an inspirational video displayed in the company website. In the video, the consumers talk about their experiences with Scale Viewer's products. This is an example of a marketer:

A) using opinion leaders as a source of social influence.
B) using coercive power through dissociative groups.
C) using brand names as cues for consumer decisions.
D) making decisions on behalf of consumers.
E) creating norms for group behavior.