Which DHCP server gives secondary Codes in Cisco TelePresece CTS-3000 and CTS-3200 systems their IP address?

Which DHCP server gives secondary Codes in Cisco TelePresece CTS-3000 and CTS-3200
systems their IP address?

A.
DHCP server on the voice VLAN

B.
DHCP server on the primary codec

C.
DHCP server on the Cisco Unified Communication Manager

D.
DHCP server on the Cisco TelePresece Manager