Which of the f

Which of the following statements is true when the database is in ARCHIVELOG mode and tablespaces are in hot backup mode？（）

• 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.