Which of the following statements is correct regarding online Oracle database backups? Please choose the correct answer.
A . The database must be running in archivelog mode.
B . The database does not write to online redo log files during online backups.
C . Online database backups are not supported by Oracle.
D . A complete online backup consists of tablespace data files and the control file, all of which are necessary for restoring the database to a consistent state.
E . Users may only read data and may not enter data while the backup is running.
Answer: A