You install Windows 2000 Professional on a new APM-compliant portable computer. You notice that whenever you attempt to shut down the computer, the Windows 2000 shutdown screen remains on the screen as the power remains on. You attempt to shut off the computer by using Power Button, but you want the computer to shut off when Windows 2000 Professional shuts down. What should you do? （）

• A、Restart the computer, disable APM in the system BIOS, and then restart the computer. 
• B、Restart the computer, use power options in control panel to enable APM, and restart the  computer. 
• C、Restart the computer, use power options in control panel to enable hibernate support, and  then restart the computer. 
• D、Restart the computer, use power options in control panel to create a different power scheme,  and then restart the computer.