How do you configure media resources for a device?

A.
Configure a device in a media resource group, then take that media resource group and add it to a media resource group list.

B.
Configure a media resource group list, then from that list build a media resource group, and then make the device part of the media resource group.

C.
Configure media resources in a media resource group list, then add that media resource group list to a media resource group, then assign that media resource group to a device or devices.

D.
Configure media resources in a media resource group, then add that media resource group to a media resource group list, then assign that media resource group list to a device or devices.