Modern era or period refers to a time after post-classical history. It can be divided in the early era (16 Th. century) and late modern era (18 Th. century).
Some examples of historical facts in the late modern era are American, French and Russian Revolution and the Industrial Revolution.
The spread of coal-powered factories has been characteristic of the modern era because coal was used to heat buildings, generate electricity and for steam engines. It generates energy for industry and transportation.
I think you'd be satisfied with the answer being B.
The 1920s and 1950s are similar in the sense that a new culture emerged. One similarity between these time periods is that they represent the United States emerging from a World War. World War I (1914-1919) and World War II (1939-1945) were two enormous global events that affected American society and alter what culture develops afterwards.
One common culture that developed during the 20's and 50's was consumerism. Consumerism is an social and economic idea that focuses on developing products that will interest the consumer (aka buyer). During both eras, companies began to advertise items in a manner that convinced American citizens to buy them. This rise of consumerism resulted in the increased purchase of items that people wanted, but didn't necessarily need.
Even though most Americans would fall into this category, there were some critics to this consumer culture. During the 1950's the Beatnik generation developed as an anti-conformist culture. Some of them saw capitalism and the increased consumerism in American society as negative.
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John Rolfe was the colonist who brought tobacco seeds and first grow tobacco in Virginia.
The following were the results of tobacco:
profit in Virginia, conflicts with American Indians over land, an influx of indentured servants and the establishment of the Headright system.