You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You write the following code segment in the code-behind file to create a Web form. (Line numbers are included for reference only.)  01 string strQuery = "select * from Products;" 02 + "select * from Categories";  03 SqlCommand cmd = new SqlCommand(strQuery, cnn);  04 cnn.Open（　）;  05 SqlDataReader rdr = cmd.ExecuteReader（　）;  06  07 rdr.Close（　）;  08 cnn.Close（　）;  You need to ensure that the gvProducts and gvCategories GridView controls display the data that is contained in the following two database tables:  ?¤The Products database tabl  ?¤The Categories database tabl  | English | Chinese | Japan | Korean | - 46 - Test Information Co., Ltd. All rights reserved. Which code segment should you insert at line 06?（）

• A、A
• B、B
• C、C
• D、D