Which option is best practice for creating a recovery catalog owner in the catalog database？（）  

• A、 Granting UNLIMITED QUOTA on the SYSTEM tablespace to the owner
• B、 Allocating the SYSTEM tablespace as the default tablespace and granting the SYSDBA privilege to the user
• C、 Creating a new tablespace，allocating this as the default， and granting UNLIMITED QUOTA on this tablespace to the user
• D、 Allocating the SYSAUX tablespace as the default tablespace and granting UNLIMITED QUOTA on this tablespace to the user