What happens when Mist subscriptions expire?

What happens when Mist subscriptions expire?
A . Devices retain their configurations and all Mist management GUI functionality remains available to the user.
B . Devices retain their configurations but Mist management GUI functionality related to expired subscriptions are not configurable by the user.
C . Devices retain their configurations for 90 days; if the subscriptions are not renewed, the configuration is deleted and the devices are reset to factory default.
D . Devices retain their configurations but the Mist user is prevented from accessing the Mist management GUI.

Answer: B