It is true that "<span>D. Patricians held the political power and did not want to allow the common people a voice in government." It was very hard to break free of the lower classes. </span>
Because they was selfish and didn’t want them to have any
Answer:

Explanation:
Albert Einstein lived from 1879 to 1955.
He passed away at the age of 76.
Great plains farming signified an agricultural revolution because industrialization took both the transportation and production of agricultural products to a much larger scale.
Railroads made cattle farming, among other agricultural products, much more profitable, as farmers/ranchers were able to ship their products around the country.
Industrialization also lead to devices that could increase the scale and speed of agriculture, and also caused corporations to become involved in large-scale production/