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Oracle9i provides a database package called dbms_redefinition to perform an online rebuild of a table.  Which two steps are you recommended to do prior to issuing thedbms_redefinition_start_redef table procedure call？（）
A:Grand privileges on the interim table.
B:Invoke the dbms_redefinition.can_redef_table procedure.
C:Invoke the dbms_redefinition.sync_interim_table procedure.
D:Create any triggers， indexes， or constraints on the interim table.
E:Create an empty interim table with all the desired characteristics.

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出自：Oracle认证

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