The DBA is defining role for users. Which of the following is not an acceptable method for defining a default role?（）<br>A:ALTER USER DEFAULT ROLE ALL<br>B:ALTER USER DEFAULT ROLE ALL EXCEPT ROLE_1<br>C:ALTER USER DEFAULT ROLE NONE<br>D:ALTER USER DEFAULT ROLE NONE EXCEPT ROLE_1

The DBA is defining role for users. Which of the following is not an acceptable method for defining a default role?（）
A:ALTER USER DEFAULT ROLE ALL
B:ALTER USER DEFAULT ROLE ALL EXCEPT ROLE_1
C:ALTER USER DEFAULT ROLE NONE
D:ALTER USER DEFAULT ROLE NONE EXCEPT ROLE_1

出自：Oracle认证

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