Cisco IP Phones are being installed on several different IP subnets in a new Cisco Unified
Communications Manager installation. Phones are not registering to Cisco Unified CM.
Which three DHCP options must be set properly in each subnet for all phones to register to Cisco
Unified Communications Manager? (Choose three.)

A.
IP address and subnet mask

B.
DNS server

C.
option 150

D.
default gateway

E.
WINS server