The correct answer is letter D.
Explanation: Rule of Law is considered a structuring principle of contemporary constitutionalism, being responsible for containing arbitrary temptations to exercise state power. It reveals the parent idea that the exercise of political power must always take place in accordance with the law. Illustrative is that maxim in English law that orders are not obeyed because they were given by an authority: orders are obeyed when they are in accordance with the law and were given by authorities legally empowered to do so.