A user named Arren is executing this query：  
select table_name，operation，undo_sql 
from 
flashback_transaction_query t， 
（select versions_xid as xid 
from employees versions between scn minvalue and maxvalue 
where employee_id = 123） e 
where t.xid = e.xid；  
When the query runs，he receives an ORA-01031： insufficient privileges error. Since the user owns the employees table，you know that it is not the problem. 
Which of the following SQL statements will correct this problem？（）

Over the course of a day，a department performed multiple DML statements （inserts， updates， deletes） on multiple rows of data in multiple tables. The manager would like a report showing the time， table name，and DML type for all changes that were made.
Which Flashback technology would be the best choice to produce the list？（）