You have a computer that runs Windows XP Professional. Multiple users share the computer. Users work in either French or English. You need to ensure that users can change the language in which the system menus appear. What should you do first?（） 

• A、From the Display Properties, modify the Desktop settings.
• B、From Internet Explorer, modify the Language Preferences. 
• C、From the Multilingual User Interface (MUI) pack installation CD, run muisetup.exe. 
• D、From Regional and Language Options, modify the Location settings and the Input Languages settings.