Final answer:
The three schools of thought from post-Zhou dynasty China are Confucianism, Daoism, and Legalism, which all influenced society, governance, and ethical norms of the time.
Step-by-step explanation:
The three schools of thought that rose out of the fragments of post-Zhou dynasty China are Confucianism, Daoism (also spelled 'Taoism'), and Legalism. These philosophies sought to end suffering and promote harmony amid widespread social unrest and conflict during that period. Confucianism shaped morality, governance, and social relations, advocating for study of texts and ethical conduct in society. Daoism emphasized harmony with the natural way and promoted concepts such as simplicity and nonaction. Legalism focused on a strong central authority maintained through a detailed legal code and the use of rewards and punishments.
The correct answer to the student's question is: A. Confucianism, Taoism, and Legalism.