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You work as a database administrator for Supportcenter.cn. While granting a role， SELECT_CATALOG_ROLE， to a user， SupportCenter， using Oracle Enterprise Manager 10g Database Control， you have cleared the DEFAULT check box. What will be the result？（）
A:The user cannot use the role at all.
B:The role would not be granted to the user.
C:The user needs to enable the role explicitly.
D:The user can start using the role immediately.
E:The user would have the admin option for the role.

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出自：Oracle认证

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