Which two are features of Cisco Unified Communications Manager Business Edition 6000?
(Choose two.)

A.
It unifies desk phone, wireless phone,IP phone, and instant messaging.

B.
It has capacity for 75 to 300 users and supports up to 10 sites

C.
It runs on the Cisco MCS 7890 hardware

D.
It is backwards compatible, which means that it will run on old Cisco MCS hardware.

E.
It supports Cisco Unified Contact Center Express.

Explanation: