An administrator does not want all of the IP phones in the network to have access to the Cisco IP
Phone Messenger service. Which two steps should be taken to prevent the phones from subscribing
to that service? (Choose two.)

A.
Create an IP phone ACL.

B.
Enable the Enterprise Subscription option on the service.

C.
Disable the Enterprise Subscription option on the service.

D.
Put the service in a separate partition.

E.
Manually subscribe the desired phones to the service.