When a hotel does not fill a room and therefore the sale of that room on that day is lost forever, that refers to... a.) product services-mix length
b.) seasonability
c.) perishability
d.) productservices-mix width
e.) tangible

c.) perishability

Explanation:

The term perishability is used in marketing to describe the inability to keep or store services for sale in the future. Services are intangible and by nature. Once a service has been performed, it is deemed to have been consumed and cannot be returned or resold.

Once a service is offered, and the customer does take up the offer, it cannot be stored or kept for sale at a later date. If a hotel room is not booked for a particular night, the room does not generate any revenues for that night.  The hotel cannot store the room services for that night and offer them to customers any other time. The inability to preserve a service for sale at a later date is what marketers refer to as perishability.

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explanation: