Following statements are all about Cisco Unified Communications Manager Express and Cisco Unified Communications Manager, which is correct?

A.
Cisco Unified Communications Manager is a router-based solution and scales up to 24,000 users.

B.
Cisco Unified Communications Manager Express is a server-based solution and Cisco Unified Communications Manager scales up to 240 users.

C.
Cisco Unified Communications Manager is a a router-based solution and Cisco Unified Communications Manager Express scales up to 300 users.

D.
Cisco Unified Communications Manager Express is a server-basedsolution and Cisco Unified Communications Manager scales up to 30,000 users.

E.
Cisco Unified Communications Manager is a router-based solution and scales up to 24,000 users.

Explanation:
All answers are wrong
CUCM is a server-based solution, and CUCM Express is a router-based solution