AsystemmustbeupgradedfromAIX5.1to5.2.Whichofthefollowingschedulingprocessesshouldbeperformed?()
A. Scheduleenoughdowntimetobackup,upgradeandreboot.
Backup,upgrade,thenscheduleenoughdowntimetorebootthesystem.
C. Backup,thenscheduleenoughdowntimetoupgradeandrebootthesystem.
D. Noschedulingprocessesarenecessarybecausenodowntimeisrequired.