What function does the device pool perform?

A.
It separates user and physical location information.

B.
It sets the default device parameters for all IP phones in the cluster.

C.
It sets the location bandwidth used between different locations.

D.
It provides a single point of configuration for every device in a Cisco Unified Communications
Manager cluster.

Explanation:
http://www.cisco.com/c/en/us/td/docs/voice_ip_comm/cucm/admin/7_1_2/ccmcfg/bccm-
712cm/b02devpl.html