Final answer:
A renowned chef endorsing a kitchen appliance is the best example of enhancing consumers' perception of a product's capabilities due to the direct relevance and credibility of the chef's expertise.
Step-by-step explanation:
The best example of a celebrity endorser enhancing consumers' perceptions of a product's effectiveness capabilities is d. A renowned chef endorsing a kitchen appliance.
This is because the chef's expertise in the culinary field directly correlates with the use and effectiveness of the kitchen appliance, thereby giving their endorsement more credibility.
Celebrity endorsements can leverage the fame and trust built by individuals to influence consumer behavior. Companies often employ brand ambassadorships and rely on the credibility and attractiveness of the endorser to persuade consumers,
similar to the way political campaigns have packaged candidates, such as John F. Kennedy, to enhance their public perception.
The best example of a celebrity endorser enhancing consumers' perceptions of a product's effectiveness capabilities is b. An athlete endorsing a health drink.
When an athlete, who is associated with fitness and health, endorses a health drink, it enhances consumers' perception of the product's ability to improve their health and athletic performance.