You need to delete an auto-registration Cisco Unified Communications Manager group for a cluster

You need to delete an auto-registration Cisco Unified Communications Manager group for a
cluster.
What should you do?

A.
Remove the Cisco Unified CallManager group devices.

B.
Disable auto-registration settings in the Cisco Unified CallManager group.

C.
Assign a different call group as the auto-registration Cisco Unified CallManager group.

D.
Delete the auto-registration Cisco Unified CallManager group without performing any action.