What does multiway provide in a telepresence solution?

A.
Systems with a single monitor can emulate dulal monitors

B.
Non-multisite endpoints can create multisit calls by transferring the call to a multipoint control unit

C.
Calls through an ISDN gateway will use more than one channel, if available

D.
All dual-monitor systems in a three-way call will show video of both of the other systems on different monitors