A user wants to upgrade to Windows 2000. Which of the following WINNT32 command switches can be run to determine whether the users computer and software is compatible with the new operating system？（）

单项选择题Auserreportsthatthecomputerisrunningslowly.AfterrunningtheSFC，atechnicianobservesthatthedllcachefolderhasbecomecorrupted.Whichofthefollowingutilitiescanberuntorepairthecontentsofthedllcachedirectory？（）

A.FORMAT
B.SFC
C.HyperTerminal
D.DEFRAG

单项选择题AusersuspectsthatarecentlyinstalledprogramoverwroteaWindowssystemfileonthecomputer.Whichofthefollowingcommandscouldberuntocheckandverifythesystemfiles？（）

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