Analysis of test questions: People's value judgment and value choice are different due to different positions, viewpoints and knowledge, but it does not mean that there is no unified standard for value judgment. Happiness is a human feeling, but it is the product of social practice. The material emphasizes people's different understanding of happiness, explains the difference of consciousness, emphasizes the subjective initiative of consciousness, and shows that consciousness is restricted by subjective and objective factors, and people have different understandings of a thing. Choose B.