Which Statement Expresses a Major Weakness of International Law

Which statement expresses a major weakness of international law?

A) It is difficult to hold states and their leaders accountable for transgressions.
B) It is completely inflexible and slow to evolve in the face of new challenges.
C) It applies only to democratic states and has no authority over nondemocratic governments.
D) It stabilizes norms in international politics, making cooperation between states unlikely.