Which of the following, if true, would best support the classical realist theory of international conflict as it is described in the passage?

• A. Some countries ruled by dictators maintain peaceful relations with their neighbours
• B. Despite the presence of a world superpower, many countries continue to fight wars with their neighbours.
• C. War has existed from the beginning of recorded history.
• D. After the nations of the world form an authoritative world court, wars decrease dramatically.