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?（）
- AOn DNS1 create a counter log.
- BOn DNS2 create a counter log.
- COn DNS1 use Active Directory Replication Monitor.
- DOn DNS2 use Active Directory Replication Monitor.