How did chinese culture change during the warring states period

The period of the Warring States took place in the time frame that began at some point in the fifth century BC and that ended in the unification of China by the Qin dynasty in 221 BC.

The Warring States period witnessed the proliferation of iron works in China, replacing bronze as the dominant metal used in the war industry. Areas such as Chu (present Sichuan) and Yue (present Zhejiang) were attracted to the Chinese cultural sphere during this period. The walls built by the states to keep away the nomadic tribes of the north and the other states were the precursors of the Great Wall of China. Different philosophies evolved towards the Hundred Schools of Thought, including Confucianism, Taoism, Legism and Moism. Ttrade also reached an important relevance, and some merchants reached a considerable power in the politics of government.

answer; (a) he was a u.s senator for 38 years;

the answer is b just took the test