which two of these will be registered on the Cisco TelePresence VCS, assuming that SIP and H.323 registration have been selected?

If an auto attendant has a numeric ID of 543 and the Cisco TelePresence MCU has a prefix
of 62 and a domain of cisco.demo, which two of these will be registered on the Cisco
TelePresence VCS, assuming that SIP and H.323 registration have been selected?
(Choose two.)

A.
[email protected]

B.
543

C.
[email protected]

D.
[email protected]

E.
62543