You are developing an ADO.NET 4.0 application that interacts with a Microsoft SQL Server 2008 server through the SQL Server Native Client.
You create a trace DLL registry entry and you register all of the trace schemas.
You need to trace the application data access layer. Which control GUID file should you use?

A.
ctrl.guid.snac10

B.
ctrl.guid.mdac

C.
ctrl.guid.adonet

D.
ctrl.guid.msdadiag

Explanation:
ctrl.guid.adonet – ADO.NET only
ctrl.guid.msdadiag – MSDADIAG only
ctrl.guid.snac10 – SQL Server Native Client Providers only (SQL Server 2008)
ctrl.guid.mdac – Windows Data Access Components (formerly Microsoft Data Access Components) on Windows 7 only

Data Access Tracing in SQL Server 2008
(http://msdn.microsoft.com/en-us/library/cc765421.aspx)