You Suspect an Employee's Win XP Computer May Have One

Multiple Choice

You suspect an employee's Win XP computer may have one or more protected files with an incorrect version for the computer. You want to run a command that will scan all protected files and replace them with the correct versions. Also, you only want this to run only once during the next boot. Which command would you use?

A) sfc /scnbot
B) sfc /revert
C) sfc /scanonce
D) sfc /scannow