The relationship among national governments can be described by several perspectives, but one statement that captures a common viewpoint is:
All national governments are legally equal.
This perspective emphasizes the principle of sovereignty, where each state has the authority to govern itself without interference from other states, regardless of size or power. However, this ideal is often complicated by realities of international relations, such as alliances and power dynamics, where larger countries may influence smaller ones.
If you're looking for a specific answer based on the choices given, it would be important to clarify the context or principles you want to focus on regarding international relations.