While planning to manage more than one database in your system， you perform the following activities：  1. Organize different categories of files into independent subdirectories.  2. Use consistent naming convention for database files.  3. Separate administrative information pertaining to each database.  Which option corresponds to the type of activities performed by you？（）

• A、Oracle Managed Files
• B、Oracle Grid Architecture
• C、Optimal Flexible Architecture
• D、Oracle database architecture