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You work as a database administrator for Certkiller .com. In the middle of a transaction， a user session was abnormally terminated but the instance is still up and the database is open. Which two statements are true in this scenario？（）
A:Event Viewer gives more details on the failure.
B:The alert log file gives detailed information about the failure.
C:PMON rolls back the transaction and releases the locks.
D:SMON rolls back the transaction and releases the locks.
E:The transaction is rolled back by the next session that refers to any of the blocks updates by the failed transaction.
F:Data modified by the transaction up to the last commit before the abnormal termination is retained in the database.

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出自：Oracle认证

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