Your company has a domain controller that runs windows server 2008 and the DNS role. The DNS domain is named contoso.com. You need to ensure that inquries about contoso.com are sent to dnsadmin@contoso.com. What should you do?（）

• A、Create a signature (SIG) record for the domain controller.
• B、Modify the name server (NS) record for the domain controller.
• C、Modify the service locator (SRV) record for the domain controller.
• D、Modify the start of authority (SOA) record on the domain controller.