Which Statement About Creating a Virtual Room in Avaya Equinox

Which statement about creating a Virtual Room in Avaya Equinox Conferencing is true?

A) It is mandatory to protect Virtual Room meetings with a participant PIN.
B) A Virtual Room number is mandatory. A Virtual Room name is optional.
C) User details must already exist and be Saved/Applied before a Virtual Room can be assigned.
D) You cannot define maximum number of a meeting participants on a per Virtual Room basis.