You use Microsoft .NET Framework 4 to create a Windows Presentation Foundation (WPF) application. You want to localize the application to use the German locale settings. You need to allow the ResourceManager class to retrieve a neutral German locale version of the text to be displayed in the user interface (UI). Which file should you add to the project?
A. Resources.de.xml
B. Resources.de-DE .xml
C. Resources.de.resx
D. Resources.de-DE .resx
