How did the economy of china change during the zhou empire? a. china’s economy contracted as nomads from the north raided villages and threatened cities. b. china’s economy expanded as farmers using iron tools were able to grow more food. c. china’s economy was threatened by huang river floods, resulting in widespread famine. d. china’s economy stalled as battles among warlords disrupted planting and destroyed crops.

I believe the answer is: B.China's economy expanded as far as using iron tools were able to grow more food

The devlopment of iron tools allow chinese citizens to increase the production in their agricultural sectors. This strengthen their position in the trades with people from European nations. Over time, this expanded china's economy and increase the prosperity level among its people.

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.

answer; ///i believe that the correct answer is ; hieroglyphs or glyphs; the maya script, also known as maya glyphs, was the writing system of the maya civilization of mesoamerica; as always plz check first..good luck