Your company has a single Active Directory domain. All servers run Windows Server 2008 R2.You install an additional DNS server that runs Windows Server 2008 R2.You need to delete the pointer record for the IP address 10.3.2.127.What should you do？（）

• A、Use DNS manager to delete the 127.in-addr.arpa zone.
• B、Run the dnscmd /RecordDelete 10.3.2.127 command at the command prompt.
• C、Run the dnscmd /ZoneDelete 127.in-addr.arpa command at the command prompt.
• D、Run the dnscmd /RecordDelete 10.in-addr.arpa. 127.2.3 PTR command at the command prompt.