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 betaken 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.
