You have a computer that runs Windows XP Professional. You download new video card driver from the Internet, and then install the driver. You restart the computer. You discover that the newly loaded video driver is named VgaSave.  You need to restore the previous version of the video card driver.What should you do?（） 

A、From the Device Manger, scan for hardware changes. 

B、From the Device Manager, access the video card properties, and then select Roll Back. 

C、From the Device Manager, access the VgaSave properties, and then run the Hardware Troubleshooter. 

D、Restart the computer. From the Advanced Startup Options menu, select Last Known Good Configuration.&e