You are the network administrator for Fabrikam， Inc. The network consists of a single Active Directory domain named fabrikam.com.  A Windows Server 2003 computer named Server1 is the only DNS server in the domain. It hosts no other zones. Users report that connecting to computers within the fabrikam.com domain is slow.  You need to find out whether DNS client traffic on Server1 is causing this problem.  What should you do？（）

• A、Use System Monitor to create a log of the DNS counters Dynamic updates/sec and Total queries/sec.
• B、Use System Monitor to create a log of the NetworkInterface counter Total bytes/sec.
• C、Enable debug logging on Server1. Configure the log to capture Notification events.
• D、Enable debug logging on Server1. Configure the log to capture Update events.