Which statement about a virtual SNR DN-configured Cisco Unified Communications Manager
Express-enabled Cisco IOS router is true?

A.
Virtual SNR DN supports either SCCP or SIP IP phone DNs.

B.
A virtual SNR DN is a DN that is associated with multiple registered IP phones.

C.
Calls in progress can be pulled back from the phone that is associated with the virtual SNR DN.

D.
The SNR feature can only be invoked if the virtual SNR DN is associated with at least one
registered IP phone.

E.
A call that arrived before a virtual SNR DN is associated with a registered phone, and still exists
after association is made, but cannot be answered from the phone.