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

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