An AIX server has 2 network interfaces and it needs to be permanently configured as a gateway.  How can this be accomplished？（）

• A、Run the command ’no -d’ to set network options to default
• B、Edit /etc/rc.tcpip and enable gated
• C、Edit /etc/rc.tcpip and enable routed
• D、Edit /etc/rc.net and enable ipforwarding