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.