Answer: .C. customer satisfaction
Step-by-step explanation:
Customer satisfaction is a marketing tool used to measure the level of fulfilment a customer has gotten from the purchase of certain goods or the patronage of certain services, businesses or organizations, customer satisfaction helps to determine if a good or service meets the expectation of the customers or not and from it businesses can assess their performance and see areas they need to improve on. The level of customer's satisfaction will determine their brand loyalty, determining if such customer will come back for such product or service.