WhichRMANbackupcommandisusedtocreatetheblock－changetrackingfile?()

A.alterdatabasecreateblockchangetrackingfile

B.alterdatabaseenableblockchangefile

C.alterdatabaseenableblockchangetrackingusingfile，/ora01/opt/block_change_tracking.fil

D.altersystemenableblockchangetrackingusingfile’/ora01/opt/block_change_tracking.fil’

E.altersystemblockchangetrackingon