You have a Windows Server 2008 R2 computer that has an IP address of 172.16.45.9/21.The server is configured to use IPv6 addressing.You need to test IPv6 communication to a server that has an IP address of 172.16.40.18/21.What should you do from a command prompt？（）

• A、Type ping 172.16.45.9:::::.
• B、Type ping ::9.45.16.172.
• C、Type ping followed by the Link-local address of the server.
• D、Type ping followed by the Site-local address of the server.