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？（）
- AThe database crashes.
- BThe DBA needs to re-create the file.
- CThe file gets re-created automatically.
- DThe file gets restored automatically from the last backup.
- EThe DBA needs to perform a complete database recovery.
- FThe DBA needs to perform an incomplete database recovery.