You backed up the database at 8 a.m. today using an online backup. Accounting made a large change to the underlying data between 10 a.m. and noon. Which of the following actions would ensure that the changes could be recovered using the 8 a.m. backup？（）
- A Create a manual incremental online database backup.
- B Back up all the archived redo logs generated since the 8 a.m. backup.
- C Create a brand-new backup after all the changes have been applied.
- D There is no way to make the changes recoverable based on the 8 a.m. backup.
- E Perform an online backup of the tablespace（s） that contained changed data.