d. all of these answers are correct
Facilitating goods, serve utilization, and service inventory are build in advance. Facilitating goods are the tangible elements that are consumed or used by the customer along the service process and which are mainly used by companies to offer a competitive advantage over the rivals. Service inventory can also be built in advance as it refers to the collection of internal services meant to help the organization react swiftly to customer demand, speed and performance at reasonable prices. Example of a service inventory is communication and process improvement.