How do you run DHCP in debug mode on a DHCP client?

A.
You kill the DHCP client process then relaunch the client process using the /sbin/dhcpagent -d2 command.

B.
You kill the DHCP client process and set DHCP_DEBUG=true in the dhcpagent configuration file.

C.
You kill the DHCP client process and edit the DHCP start script to use the in.dhcpd -i <interface> -d -v
command. You then run the DHCP start script.

D.
You kill the DHCP client process and edit the DHCP start script to include the DHCP_DEBUG=true;
export DHCP_DEBUG statement. You then run the DHCP start script.