You create a Microsoft ASP.NET application by using the Microsoft .NET Framework version 3.5. The application contains the following code segment：   public class CapabilityEvaluator  {  public static bool ChkScreenSize（System.Web.Mobile.MobileCapabilities cap， String arg） { int screenSize = cap.ScreenCharactersWidth * cap.ScreenCharactersHeight；   return screenSize < int.Parse（arg）；   }  }    You add the following device filter element to the Web.config file：       You need to write a code segment to verify whether the size of the device display is less than 80 characters.  Which code segment should you use？（）

• A、A
• B、B
• C、C
• D、D