What is the purpose of the global configuration command, ip dhcp relay information option vpn?

A.
enables the DHCP relay agent to insert the VPN suboptions to the BOOTP request

B.
enables the DHCP relay agent to convert the broadcast DHCP request to a unicast DHCP
request to a
shared DHCP server

C.
enables the DHCP relay agent to perform VRF-aware NAT before forwarding the DHCP
request to a
shared DHCP server