A. Archive log generation is suspended until the tablespaces are taken out of hot backup mode. 
B. Datafiles are not written to during hot backups.
C. Changes to the database are cached during the backup and not written to the datafiles to ensure that the datafiles are consistent when recovered.
D. The datafile headers are not updated during the backup.
E. The way data is written to the online redo logs is unchanged during the backup.

A. The plan will work as is.
B. The plan needs to be modified to allow for an archive-log switch after step 3.
C. The plan needs to be modified so that a backup of the archived redo logs occurs before step 1.
D. The plan needs to be adjusted to shut down the database after step 1 and to restart the database after step 2.
E. The plan cannot work as presented.