Answer:
c. To convince you that you could be a great athlete if you ate healthier food
Step-by-step explanation:
Classical conditioning is a term that describes the concept of learning method, in which a biologically potent stimulus shown a direct relationship with a previously neutral stimulus.
Here, the biological stimulus is the "healthier food" and a neutral potent stimulus is "becoming a great athlete"
Therefore, applying classical conditioning, an advertiser will want their food product to be associated with an athlete because it will make people believe that, when one eats their food products which is considered healthier, it could make them become great athletes.