Which three determinations are possible when using the Presence feature in a Cisco Unified Communications network? (Choose three.)

A.
Determine if a set of IP phones is on hook or off hook if if the phones are in the same Cisco Unified Communications cluster as the watcher.

B.
Determine if an IP phone is on hook or off hook if the phone is in the same Cisco Unified Communications cluster as the watcher.

C.
Determine if an IP phone is on hook or off hook if the phone is outside the Cisco Unified Communications cluster of the watcher.

D.
Determine if an IP phone has been moved or the user has been changed if the phone is in the same Cisco Unified Communications cluster as the watcher.

E.
Determine if an IP phone has been unplugged if the phone is in the same Cisco Unified Communications cluster as the watcher.

F.
Determine if an IP phone has been off hook beyond a specified period of time if the phone is in the same Cisco Unified Communications cluster as the watcher.