Which of the following iscorrect regarding the Cognos 10 security environment?

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Which of the following iscorrect regarding the Cognos 10 security environment?

A. Cognos 10 must be configured to use only one authentication provider at a time.
B. To perform authentication of users, a connection to the Cognos namespace must be defined.
C. In Framework Manager, object security is implemented by defining access to objects for users, groups and roles defined in the authentication providers.
D. In Framework Manager, object security is implemented by defining access to objects for groups and roles (of which usersare members), not individual users.