Which statement is correct when discussing room materials for Cisco TelePresence Room?

A.
The audio subsystem is not designed to deliver excellent performance for normal drywall room
surface.

B.
Standard drywall walls with a smooth finish are preferred.

C.
Walls and wall coverings with heavy textures are encouraged

D.
Cinder block and brick can be highly reverberant and therefore will likely require a cost paint.

E.
Thin walls and doors should be enough to block unwanted sound from leaking into the room

Explanation: