Amir runs an arena that hosts sporting and music events. When booking these events, he must consider how many people would be interested in buying tickets. Based on the demand, he must set his ticket prices at the appropriate level. Which challenge is associated with providing this type of service?A. It is difficult to accurately estimate the demand to match the right supply of a service. B. When providing this type of service, it is difficult to balance in-person and online ticket sales. C. It is difficult to determine the appropriate level of customer contact required when providing such a service. D. With services like this, it is difficult to ensure that the produced outputs will be worth more than the combined costs of the inputs. E. It is difficult to convince customers to spend money on tangible services like this.