What are two characteristics of a Cisco Unified Communications Manager Enterprise parameter?

What are two characteristics of a Cisco Unified Communications Manager Enterprise
parameter? (Choose two.)

A.
It is used to define clusterwide settings.

B.
It is used to configure settings for different services.

C.
It is used to define end-user authentication settings.

D.
It is used to configure settings for specific services.

E.
It sets initial values of device-defaults.