Answer:
C). Doctor.
Explanation:
As per the question, 'doctor' would be considered as the 'most service-dominant' along the 'service-product continuum'(continuous change) as a doctor exchanges his services(and dependent on it) in return for the money that he uses for purchasing goods ultimately(exemplifies continuous series of service-product). The other options like (grocery, specialty store, and bookstore) exchanges goods in return as they are 'product-oriented' while the 'restaurant' is both service and product-oriented as it offers both goods(food) and services(through ambiance, waiters, etc.) at the same time. Thus, option C is the correct answer.
