Answer: A.
The user pays for access to a product or service whether he or she uses it during the payment term or not.
Explanation: the subscription-based business model is that the user must pay for the services, even if the user did not make use of that service, for example, if a user subscribe for a television cable, and he/she traveled and was not around to watch the TV, the cable has been paid for and he was not chanced to make use of it.
Industries that use this model presently are cable television, cellular service providers, satellite radio, Internet service providers, and health clubs.