Question

Iron and coal industries:

failed during the Tang Dynasty
flourished during the Tang dynasty
employed a vast number of workers during the Tang Dynasty
impacted agriculture by using too much water during the Tang Dynasty

Answer 1

Answer:

failed during the Tang dynasty

Answer 2

Answer:

In science, the Tang Dynasty (618 - 907) contributed a lot to the development of astronomy, medicine and printing technique in Chinese history. The famous astronomer, Monk Yixing, was the first to successfully measure the length of the meridian line.