Analysis of test questions: Kant's masterpiece "Critique of Pure Reason" insists that people should be self-disciplined and not interfere with the freedom of others for the sake of personal freedom. All freedom and equality can only be within the scope of the law, so choose C.

Comments: German philosopher Kant is also one of the enlightenment thinkers. He wrote Critique of Pure Reason, which holds that: ① The core of the Enlightenment is that people should think independently and make rational judgments; (2) Emphasize the importance of human beings, who are human beings, not tools to achieve any purpose; (3) Sovereignty belongs to the people, who should have freedom and self-discipline, and freedom and equality can only be within the scope of the law.