Your company has a single Active Directory domain named contoso.com. All servers in the domain run Windows Server 2003 Service Pack 2 (SP2). You have two DNS servers named DNS1 and DNS2. DNS1 hosts an Active Directory-integrated zone for contoso.com. DNS2 hosts a standard secondary zone for contoso.com. You need to monitor the total number of zone transfer requests.  What should you do?（）

• A、On DNS1 create a counter log.
• B、On DNS2 create a counter log.
• C、On DNS1 use Active Directory Replication Monitor.
• D、On DNS2 use Active Directory Replication Monitor.