In which scenario will you perform a cancel-based recovery？（）

• A、 when a tablespace is dropped and you have only RMAN-based backup of the database
• B、 when a table is dropped and stored in the Recycle Bin
• C、 when you are required to recover an existing table to its previous state
• D、 when a tablespace is dropped and you have only a user-managed full backup of the database