Which two statements are true about the context of an application? (Choose two.)
A. It is attached to a session.
B. It is owned by the user SYS.
C. A user can change the context of his or her application.
D. The PL/SQL package associated with the context must exist before the context is created.
E. The predefined attributes in the USERENV application context can be changed as per the requirements.
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