What is the default behavior when media resources are registered in a CCM cluster?

A.
Media resources are immediately available to devices when places into a Media Resource Group.

B.
Media resources are unavailable to devices until they are placed into a Media Resource Group and assigned to a device.

C.
Media resources are available to devices even when they are not placed into a Media Resource Group and assigned to a device.

D.
Media resources are available to devices only when first placed in a Media Resource Group and then a Media Resource Group List, which is then assigned to a device.

Explanation:
CCM provides a default list of media resources. The default list of media resources includes all of the media resources that have not been assigned to an MRG. If media resources have been configured but no MRGs have been defined, all media resources are on the default list, and all media resources are available to all CCMs within a given cluster.
Reference: Page 323 – CIPT Student Guide 3.3