You discover that a particular group of settings named UserPreferences changes.You need to store the UserPreference settings to prevent affecting other applications. Which two actions should you perform？（）

• A、Use the Properties.USerPreferences object
• B、Use the Properties.Settings.Default.Userprefences object
• C、Use the ConfigurationManager.AppSettings object during runtime
• D、Create the settings by using Application scope
• E、Create the settings by using User scope