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.