Answer:
(B) Underground Irrigation Canals
Explanation:
Answer :in the decades following the Civil War, the United States emerged as an industrial giant. Old industries expanded and many new ones, including petroleum refining, steel manufacturing, and electrical power, emerged. Railroads expanded significantly, bringing even remote parts of the country into a national market economy.
Industrial growth transformed American society. It produced a new class of wealthy industrialists and a prosperous middle class. It also produced a vastly expanded blue collar working class. The labor force that made industrialization possible was made up of millions of newly arrived immigrants and even larger numbers of migrants from rural areas. American society became more diverse than ever before.
Because they both wanted to be better in everything. They had the race to space also they both had nuclear power
Answer and Explanation:
"Golden age" is the term used to designate governments that have promoted great economic, scientific, territorial, military, artistic and political growth. In other words, we can say that this term is used to designate periods when a government has promoted highly successful policies in a region, leading it to great achievements.
Regarding the Han and Tang dynasties, we can say that the similarities between the successes that they brought are related to the great economic, artistic and scientific growth that they promoted in China.