I think the answer is ..Baghdad and Moscow.
B) The mining and cattle ranching industries increased in the West.
Railroad made transporting resources and goods to cities to be manufactured and processed which encouraged growth in the western industries.
Mining for gold, silver, iron, and tin contributed to production of manufactured goods. The ability to make money off of the mining industry attracted settlers. Ranching also increased in production with land opening up in the southwest and railroads connecting ranching areas to major meatpacking cities, like Chicago.
Smoking became very popular.
Changed diet kept people from starvation.
Corn fed livestock grew in places where other plants couldn't grow in
The (Yellow River) is especially important to China’s early history. Winds from the Gobi Desert blow (sediment/sand) onto the river valley. When the river floods, it then deposits the rich material onto the surrounding plain. Because of this (Farming) was made possible in China.
