Answer:
The answer is variability (option C)
Step-by-step explanation:
Variability characteristic of service also known as Heterogeneity is one of the 4 characteristics (other 3 are perishability, intangibility and inseparability) that distinguish a service. It explains that a service may vary in quality or standard from one occasion to the next or from one provider to the other. This explains the reason why a customer who patronizes a particular barbing salon might get a great haircut sometimes and an unsatisfactory cut at other times.