What is an example of source bolstering?

Source bolstering refers to a strategy where the credibility or attractiveness of a source is enhanced to make the message more persuasive. In this context, option C is correct because it emphasizes an individual's attractiveness as a means of improving the perception of the message being delivered. If the source is perceived as attractive, consumers may be more inclined to trust or be influenced by their message or endorsement.

In contrast, while options like "The product is affordable" may appeal to the audience's values or needs, it does not enhance the credibility or attractiveness of the source in the same way. Similarly, the quality of the advertisement itself (option B) does not directly contribute to bolstering the source. Lastly, while option D discusses the brand's history, it pertains more to brand credibility than to enhancing the attractiveness of the individual delivering the message. Thus, option C best exemplifies source bolstering through the lens of personal appeal.