What is the purpose of a DHCP Relay Agent in an NSX Edg…

What is the purpose of a DHCP Relay Agent in an NSX Edge configuration?

A.
Configures virtual machine interfaces to which DHCP messages are relayed.

B.
Configures Edge interfaces from which DHCP messages are relayed.

C.
Configures Edge interfaces to which DHCP messages are relayed.

D.
Configures virtual machine interfaces from which DHCP messages are relayed.

Explanation:
http://pubs.vmware.com/NSX-61/index.jsp#com.vmware.nsx.admin.doc/GUID-C655D21F-C800-
4C7F-A887-F5733810DF34.html