You deploy mobile devices that run Microsoft Windows Mobile 5.0 Pocket PC Phone Edition.   You need to prevent the device screen from turning dark when users view documents.   Which two actions should you perform？（）

• A、Configure the backlight brightness setting to maximum.
• B、Display the soft input panel （SIP） when users read documents.
• C、Increase the value of the Turn off device if not used for option.
• D、Increase the value of the Turn off backlight if device is not used for option.