What strategy might be employed in advertising that relies on a recommendation from an authority figure?

The correct strategy in this context is expert endorsement, as it specifically involves utilizing the credibility and authority of an expert to promote a product or service. When an authority figure, such as a well-known scientist, doctor, or industry leader, recommends a product, it leverages their expertise in the field to instill confidence and trust in potential consumers. This form of advertising can be particularly effective because people are more likely to trust information that comes from someone they perceive as knowledgeable or an expert in a relevant area.

The effectiveness of expert endorsement stems from the psychological impact of authority on decision-making. When an expert vouches for a product, it encourages potential customers to view the product more favorably, as they associate the endorsement with professional credibility and proven efficacy. This approach can significantly influence consumer perceptions and behaviors, driving them toward a purchasing decision based on the respected opinion of the expert.

In contrast, other options such as peer review, popularity, and social proof bring in different elements of persuasion. Peer review usually involves the evaluation of work by one or more experts in the same field, which is less about direct endorsement. Popularity often emphasizes the number of people who approve of or purchase a product rather than the recommendation of an authority. Social proof involves looking to