Analysis of test questions: This question examines contradictions. A is wrong, and the transformation of both sides of the contradiction is conditional. The topic says that the harmony between yin and yang is the basis of the movement and change of the universe Yin and yang change, overall harmony, and everything changes. It emphasizes the unity of opposites and contradictions to promote the development of things, so D is in line with the meaning of the question, while B and C are correct but not in line with the meaning of the question, so D should be excluded.
Comments: Candidates in this question can take two steps. The first step is to eliminate the wrong options, and the transformation of both sides of the contradiction is conditional. The second step is to eliminate irrelevant options, so that you can get a moderately difficult answer.