On the assumption that every OSPF router in a particular area is configured with there is no loopback interface set?（）

• A、The IP address of the first Fast Ethernet interface.
• B、The IP address of the console management interface.
• C、The highest IP address among its active interfaces.
• D、The lowest IP address among its active interfaces.
• E、There will be no router ID until a loopback interface is configured.