You are in the middle of a transaction and very crucial data has been modified. Because of a hardware failure， the instance has shut down before synchronizing all the database files. Which two statements are true？（）
- AOn startup， SMON coordinates instance recovery.
- BOn startup， CKPT coordinates instance recovery.
- COn startup， use RMAN to perform instance recovery.
- DUncommitted changes will be rolled back after the database is opened.
- EOn startup， perform media recovery and then instance recovery.
- FOn startup， all the files will be synchronized and you get both committed and uncommitted data.