Your network consists of a single Active Directory domain.
All domain controllersrun Windows Server 2008 R2.
You need to capture all replication errors from all domain controllers to a central location.
What should you do?

A.
Start the Active Directory Diagnostics data collector set.

B.
Start the System Performance data collector set.

C.
Install Network Monitor and create a new a new capture.

D.
Configure event log subscriptions.

Explanation:
http://technet.microsoft.com/en-us/library/cc748890.aspx
Configure Computers to Forward and Collect Events
Before you can create a subscription to collect events on a computer, you must configure both the collecting
computer (collector) and each computer from which events will be collected (source).
http://technet.microsoft.com/en-us/library/cc749183.aspx
Event Subscriptions
Event Viewer enables you to view events on a singleremote computer. However, troubleshooting an issue
might require you to examine a set of events storedin multiple logs on multiple computers.
Windows Vista includes the ability to collect copies of events from multiple remote computers and store them
locally. To specify which events to collect, you create an event subscription. Among other details, the
subscription specifies exactly which events will becollected and in which log they will be stored locally. Once a
subscription is active and events are being collected, you can view and manipulate these forwarded events as
you would any other locally stored events.
Using the event collecting feature requires that you configure both the forwarding and the collecting computers.
The functionality depends on the Windows Remote Management (WinRM) service and the Windows Event
Collector (Wecsvc) service. Both of these services must be running on computers participating in the
forwarding and collecting process.
http://technet.microsoft.com/en-us/library/cc961808.aspx
Replication Issues