You are in the middle of a transaction updating a very important table. The machine on which a database wasrunning reboots because of power outage. This caused a database instance failure. Which statement is true inthis situation（）
- AThe online redo log files and archived redo log files are required to accomplish the recovery.
- BThe uncommitted transaction will be committed at the next startup of the database instance.
- CThe uncommitted transaction is rolled back automatically at the next opening of the database.
- DThe DBA has to perform the recovery on the database to recover the uncommitted transactio