Your database has a table customers that contains the columns…

Your database has a table customers that contains the columns cust_name, amt_due, and old_status.

A.
Supplemental logging is not enabled for the database.

B.
The undo data that existed for versions of rows before the change to the table structure is invalidated.

C.
The DB_FLASHBACK_RETENTION_TARGET parameter is set toa lower value and the undo data pertaining to the first transaction is flushed out.

D.
Undo retention guarantee is not enabled.

E.
Flashback Data Archive is full after the first update statement.