Which code segment should you insert at line 04?

You use Microsoft Visual Studio 2010 and Microsoft .NET Framework 4 to create an application. The application connects to a Microsoft SQL Server database. The application uses the following object query to load a product from the database. (Line numbers are included for reference only.)

01using (AdventureWorksEntities advWorksContext = new AdventureWorksEntities())
02{
03ObjectQuery <Product> productQuery = advWorksContext.Product.Where(“it.ProductID = 900”);
04
05}

You need to log the command that the query executes against the data source. Which code segment should you insert at line 04?

A.
Trace.WriteLine(productQuery.ToString());

B.
Trace.WriteLine(productQuery.ToTraceString());

C.
Trace.WriteLine(productQuery.CommandText);

D.
Trace.WriteLine(((IQueryable)productQuery).Expression);