You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5.  You create a page that contains the following code fragment.  | English | Chinese | Japan | Korean | - 92 - Test Information Co.， Ltd. All rights reserved.   You write the following code segment in the code-behind file for the page.  void BindData（object sender， EventArgs e） {  lstLanguages.DataSource =  CultureInfo.GetCultures（CultureTypes.AllCultures）；  lstLanguages.DataTextField = "EnglishName"；  lstLanguages.DataBind（）；  }  You need to ensure that the lstLanguages ListBox control maintains the selection of the user during postback.  Which line of code should you insert in the constructor of the page？（）

• A、this.Init += new EventHandler(BindData); 
• B、this.PreRender += new EventHandler(BindData); 
• C、lstLanguages.PreRender += new EventHandler(BindData); 
• D、lstLanguages.SelectedIndexChanged += new EventHandler(BindData);