A constitutional government by definition is a

A constitutional government is defined as a limited government because its primary purpose is to place legal boundaries on state authority to protect individual liberties and prevent arbitrary rule. While "popular government" (Option B) is a common democratic feature, it is incorrect because a government can be elected by the majority yet still exercise absolute, unchecked power if not constrained by a constitution. This question tests the core concept of Constitutionalism, which posits that the power of the state is not absolute but restricted by a supreme law.