How does Cisco define Telepresence?

A.
a high-definition video-conferencing system

B.
a high-definition video system installed in a studio-quality conference room

C.
a high-definition video system with spatial audio installed in a studio-quality conference room

D.
a technology that allows people who are miles apart to feel like they are in the same room

E.
a technology that allows a large group of people to experience video conferencing