Answer:
D. erosion of the rule of law.
Step-by-step explanation:
This can be described as an erosion of the rule law, because this type of policies is offering a huge gap inside the law, it can be distorted is such many ways, that at some point it won't represent an actual functional law. The subjectivity behind "to avoid testifying in trials if they declare that their testimony could damage national security or interests" is too much. A member of the legislature could avoid testifying into important cases just with the excuse that is national security.