Your network consists of a single Active Directory domain named contoso.com. All servers runWindows Server 2003 Service Pack 2 (SP2). All client computers run Windows XP Professional Service Pack 3 (SP3). You have two DNS servers named DNS1.contoso.com and DNS2.contoso.com. All client computers are configured to use DNS1 as their preferred DNS server and DNS2 as an alternate DNS server. You need to verify that DNS1 is responding to name resolution queries from a client computer.  What should you run from the client computer?（）  

• A、Ipconfig.exe /displaydns.
• B、Nbtstat.exe Cr.
• C、Nslookup.exe - dns1.contoso.com.
• D、Ping.exe dns1.contoso.com.