A constraint is defined as INITIALLY IMMEDIATE but is DISABLED. You attempt to ENABLE VALIDATE the constraintWhich two are true?

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A、DML is prevented while the constraint is being enable
B、The command does not validate existing rows.
C、The command fails if any table row violates the constraint.
D、The constraint is only enforced for rows inserted or updated after enabling the constraint.
E、xisting rows that violate the constraint are permitte