You are working on a 24x7 （available 24 hours per day， 7 days per week） production database. An operating system （OS） user deletes the alert log file accidentally. Which statement in this scenario is true？（）
A、The database crashes.
B、The DBA needs to re-create the file.
C、The file gets re-created automatically.
D、The file gets restored automatically from the last backup.
E、The DBA needs to perform a complete database recovery.
F、The DBA needs to perform an incomplete database recovery.
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