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