A user reports that the computer is running slowly. After running the SFC， a technician observes that the dllcache folder has become corrupted. Which of the following utilities can be run to repair the contents of the dllcache directory？ （）

A.system /v
B.winnt /s
C.sfc /scannow
D.chkdsk /f

A.CD
B.RD
C.MD
D.SD

A.Right-click the folder > Properties > Security tab > select the username from the list > Permissions > clear the box labeled Read > OK
B.Open the folder > Tool > Folder Options > General tab > Read-only > OK
C.Open the Command Prompt > type attrib r [drive：][path] > Enter
D.Open the Command Prompt > type attrib +r [drive：][path] > Enter
E.Right-click the folder > Properties > General tab > Attributes > select Read-only > OK