Which two statements are true about this flashback scenario?

You want to flash back a test database by five hours.
You issue this command:
SQL > FLASHBACK DATABASE TO TIMESTAMP (SYSDATE – 5/24);
Which two statements are true about this flashback scenario?

A.
The database must have multiplexed redo logs for the flashback to succeed.

B.
The database must be MOUNTED for the flashback to succeed.

C.
The database must use block change tracking for the flashback to succeed.

D.
The database must be opened in restricted mode for the flashback to succeed.

E.
The database must be opened with the RESETLOGS option after the flashback is complete.

F.
The database must be opened in read-only mode to check if the database has been flashed
back to the correct SCN.

Explanation:
B: The target database must be mounted with a current control file, that is, the
control file cannot be a backup or have been re-created.
D: You must OPEN RESETLOGS after running FLASHBACK DATABASE. If datafiles are not
flashed back because they are offline, then the RESETLOGS may fail with an error.
Note:
* RMAN uses flashback logs to undo changes to a point before the target time or SCN, and then
uses archived redo logs to recover the database forward to make it consistent. RMAN
automatically restores from backup any archived logs that are needed.
* SCN: System Change Number
* FLASHBACK DATABASE to One Hour Ago: Example

The following command flashes the database by 1/24 of a day, or one hour:
RMAN> FLASHBACK DATABASE TO TIMESTAMP (SYSDATE-1/24);