Refer to the exhibit. 

A Cisco collaboration engineer has been asked to remove the ability HQ phone 2 to dial HQ phone 1 by URI dialing. After removing the partition assigned to hqphone1@cisco.com HQ phone 2`s CSS, HQ phone 2 is still able to reach HQ phone 1. Why is the HQ phone 1 still reachable using URI dialing? 

Answer options:

A. Directory URI Alias partition has been defined in Enterprise parameters.
B. Phone needs to be reset for changes to take effect.
C. Directory URI partition cannot be deleted therefore still will be reachable.
D. CSS Changes failed to be applied after hitting save due to Database replication issues.

A