You have just installed a new web server on the Testking network. You are required to ensure that the web server is accessible from the Internet. The network uses private addressing, so an IP-to-registered address mapping is required.To do this, you enter the following command:TestKing(config)# ip nat inside source static 192.168.2.1 198.18.1.254 You unsuccessfully try to ping the Internet from a PC host on the LAN. During the troubleshooting process, you enter the "show ip nat translations" command but the output is blank. What is the most likely cause of the problem?（）

• A、The keyword overload is missing from the command.
• B、The NAT pool must be defined first.
• C、An access list must be defined to create static NAT translations.
• D、The interfaces must be configured for NAT.
• E、None of the above