Your network contains an Active Directory domain named contoso.com.You run nslookup.exe as shown in the following Command Prompt window. You need to ensure that you can use Nslookup to list all of the service location （SRV） resource records for  contoso.com. What should you modify（）

• A、the root hints of the DNS server
• B、the security settings of the zone
• C、the Windows Firewall settings on the DNS server
• D、the zone transfer settings of the zone