单项选择题

A.perform an exhaustive disk check， locate bad sectors，……

The CHKDSK /R command allows a technician to：（）

A.perform an exhaustive disk check， locate bad sectors， and recover readable information.
B.set a disk as read-only， perform an exhaustive disk check and repair bad sectors.
C.scan and verify the versions of all protected system files using the tools default operation.
D.consolidate fragmented files and folders on the computers hard disk.

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D.In Computer Management.

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