单项选择题

A.AB.BC.CD.DYou delete content from a file named Speed.……

You delete content from a file named Speed.doc that is stored in the C:\Data folder. You edit 20 files in this folder over the next two days. You need to restore the version of the file that had the correct data. You also need to ensure that the other fiels in the folder remain unaffected.
What should you do?（）

A.A
B.B
C.C
D.D

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