Which feature in Cisco WebEx is the most important differentiator compared to other vendors in
the collaboration technology?

A.
Cisco WebEx is always installed on-premises

B.
With an account, everyone can join Cisco WebEx meetings.

C.
Web conferencing service is delivered over a proprietary network, which is optimized for
security, performance, and reliability.

D.
Cisco WebEx could be installed or collocated with Cisco Unified Communications Manager

Explanation: