单项选择题

AnapplicationfailstostartafteraTechnologyLevelupgrade.TheapplicationvendorrecommendsthattwofilesetsupgradedaspartofthenewTechnologyLevelberejected.Whatistherecommendedmethodforperformingthistask?()

A.Runinstfix-utorejectthefilesets.
B.Runinstallp-rtorejectthefilesets.
C.Runinstallp-utouninstallthefilesets.
D.Restorethesystemtopreviousstatefromthesystembackup.
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