547.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.
正确答案是B