You are the administrator of you company network. A user named Peter requests assistance in his Windows 2000 Professional portable computer. Peter is preparing for his test and wants to optimize the battery life for his portable computer. You want to configure Peter’s computer to save the contents of memory on hard disk and then shutdown when Peter presses the sleep button.  What should you do？ （）

• A、Configure power settings to use the standard option. 
• B、Configure power settings to use the power off option. 
• C、Configure power settings to use the hibernate option. 
• D、Configure power settings to use always on power scheme. 
• E、Configure the computer to use the portable laptop power scheme.