You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You write the following code fragment. You need to ensure that the style is applied to all labels within the application. What should you do?（）

• A、 Add the style to the <Grid.Resources> section of the main window. 
• B、 Add the style to the <Window.Resources> section of the main window.
• C、 Add the style to the <Application.Resources> section of the App.xaml file. 
• D、 Add the style to the <Application.Properties> section of the App.xaml file.
• E、 Add the style to the <ResourceDictionary> section of the ResourceDictionary.xaml file.