You work as a systems administrator at YourDomain.com. You are meeting a potential customer who hesitates that whether Cisco Unified Communications will conform to industry standards or not. As far as you know, which three responses will clear his doubt utmostly? (Choose three.)

A.
Cisco supports open standards such as PoE and SIP.

B.
No vendor works conform to standards, so this will not be an issue.

C.
All standards of IP telephony are currently available only as drafts.

D.
Cisco is making and leading the market; therefore many standards are initiated by Cisco.

E.
Cisco is a progressive company by nature, so there will always be occasions when products and services are developed that break new ground.