Under which three conditions will a Cisco 9971 IP Phone request the "xmldefault.cnf.xml" file from a TFTP server in a Cisco Unified CM cluster? (Choose three) 

Answer options:

A. The phone is registered to the CUCM cluster but need to update its firmware
B. The phone is attempting to register to the CUCM cluster for the first time
C. Auto-registration is disabled on CUCM cluster
D. The phone has not yet been defined in the CUCM database
E. The phone is attempting to change from SIP firmware to SCCP firmware
F. Auto-registration is enabled on CUCM cluster

BDF