In which scenario is a Database Administrator NOT required to perform an incomplete recovery?()
A: when all the online redo log groups are multiplexed and one of the members of a group is missing
B: when all the online redo log groups are not multiplexed and one log group is missing
C: when all the control files are missing
D: when some important tables are deleted from the database and purged from the Recycle Bin
出自:Oracle认证