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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

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出自：Oracle认证

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