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？（）

• A、On startup， SMON coordinates instance recovery.
• B、On startup， CKPT coordinates instance recovery.
• C、On startup， use RMAN to perform instance recovery.
• D、Uncommitted changes will be rolled back after the database is opened.
• E、On startup， perform media recovery and then instance recovery.
• F、On startup， all the files will be synchronized and you get both committed and uncommitted data.