Which two of the following statements are true regarding the DHCP relay agent? (Choose two.)

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Which two of the following statements are true regarding the DHCP relay agent? (Choose two.)

A. DHCP relay is required if the DHCP clients and the DHCP servers are located in the same broadcast domain
B. The DHCP server uses the ciaddr IP address to select an IP address pool from which to assign the IP addresses to the DHCP client.
C. The primary function of a DHCP relay agent is to relay the DHCP messages from the local DHCP clients to the remote DHCP servers.
D. DHCP discovery messages are broadcasted from the DHCP relay agent to the DHCP servers.
E. When the DHCP relay agent receives a broadcast packet from a connected client, it changes the giaddr field from zero to the relay agent IP address, and forwards the message to the DHCP server.