In which scenario do you use the Flashback Database feature？（）
- A when a table is dropped and you restore it from the Recycle Bin
- B when a user’s schema is dropped and you recover the user’s schema
- C when some incorrect data is inserted in the table and you retrieve the table to a state that was at a certain timestamp
- D when a row of a table is updated frequently and committed， and you view all the versions of the row within a specific duratio