you need to start the database in the MOUNT state?

You executed the STARTUP MOUNT command to start your database. For which database
operation do you need to start the database in the MOUNT state?

A.
Dropping a tablespace in your database

B.
re-creating the control files, after you lost all the control files in your database

C.
dropping a user in your database

D.
renaming the control files

E.
enabling or disabling redo log archiving