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單項選擇題

You have a USB drive. You connect the drive to a computer that runs Windows XP Professional Service Pack 2 (SP2). You discover that after 15 minutes, the USB drive fails to appear in My Computer. You need to ensure that the USB drive appears in My Computer.
What should you do?()

A.At the command prompt, run defrag.exe -f.
B.At the command prompt, run chkdsk.exe /f. 
C.From Disk Management, assign a drive letter to the USB drive. 
D.Delete the usbui.dll file from the computer, and then restart the computer.

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