单项选择题
A work order states that a customer used Windows updates and after rebooting the computer， the video driver was corrupted and the computer was in safe mode. Which of the following would be the BEST action to take？（）
A.Download and install the correct video driver from the manufacturer’s web site.
B.Remove the video driver and reboot the computer.
C.Use the Driver Roll Back feature in Device Manager.
D.Go back to Windows update and specify the correct video driver.
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Whenacomputerdoesnotrecognizeaninternalmodem，atechnicianshoulddeterminewhether：（）
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B.the number being dialed is valid.
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