You are developing an ASP.NET Web application. You create a master page. The master page requires a region where you can add page-specific content by using theASP.NET page designer. You need to add a control to the master page to define the region. Which control should you add？（）

A.Use an ObjectDataSource control and set its TypeName property to System.Data.SqlClient.SqlConnection.
B.Use a SqlDataSource control and configure its ConnectionString in the web.config file.
C.Use an XmlDataSource control together with an Xml control that represents the database.
D.Use a LinqDataSource control with entity classes that represent the elements in the database.

A.Set the DataPager control’s PageSize property to the number of rows to view at one time.
B.Set the DataPager control’s PagedControlID property to the ID of the ListView control.
C.In the code-behind file， set the DataPager control’s Parent property to the ListView control.
D.In the code-behind file， set the ListView control’s Parent property to the DataPager control.

A.RowDataBound
B.RowCommand
C.RowUpdated
D.RowEditing