Which three steps must be completed in order to assign a service URL to an IP phone button?
(Choose three.)

A.
Add an IP phone service.

B.
Subscribe the phone to the service

C.
Associate a valid user profile with the phone.

D.
Assign the IP phone service partition to the CSS of the phone.

E.
Create a soft key template that includes a service URL and assign it to the phone.

F.
Create a phone button template that includes a service URL and assign it to the phone.