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.