ASystempadministratorisreviewingroot’scommandhistoryonadevelopmentserverandfindsthatajunioradminstratorhadbeenattemptingtocorrectafullfilesystem.Oneofthefollowingcommandscauseddamagethatmustbecorrected.Whichcommandwasit（）
A.rm\/var\/preserve\/*
B.cat\/dev\/null\/var\/adm\/cron\/log
C.\/var\/adm\/wtmp
D.rm\/var\/adm\/ras\/errlog
参考答案：D
