Which of the Following Statements Is True Concerning the Critical

Which of the following statements is true concerning the critical success factors dealing with service?

A) Service means giving the customer what the firm promised;it is the degree to which the customer is satisfied.
B) Service is the price of a product which must cover its costs or the organization will no longer make the product.
C) Service can be described as the expectations the customer has about all aspects,both tangible and intangible,of the product's purchase and use.
D) None of the answers is correct.