Which of the following conclusions would be accurate?

You are CCNA VOICE associate in Certkey.com. You need to verify the network configuration that was performed by a colleague. Which of the following conclusions would be accurate?

A.
The network subnet mask should be class A.

B.
The network subnet mask should be class C.

C.
The CME IP address should be in a different subnet to that of the IP phones.

D.
The CME IP address should be in the exclusion range.