D. the exile of Napolean to St. Helena
Answer:
Sitting Bull (c. 1831-1890) was a Teton Dakota Native American chief who united the Sioux tribes of the American Great Plains against the white settlers taking their tribal land. The 1868 Fort Laramie Treaty granted the sacred Black Hills of South Dakota to the Sioux, but when gold was discovered there in 1874, the U.S. government ignored the treaty and began to remove native tribes from their land by force.
The ensuing Great Sioux Wars culminated in the 1876 Battle of Little Bighorn, when Sitting Bull and Crazy Horse led united tribes to victory against General George Armstrong Custer. Sitting Bull was shot and killed by Indian police officers on Standing RocPlz k Indian Reservation in 1890, but is remembered for his courage in defending native lands.
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The air pollution in London reached its highest point around 1875.
As a result of the Industrial Revolution, London became:
- overpopulated
- heavily polluted
- quite noisy
From the description of the graph, we can tell that around the year 1875, London suffered the highest air pollution shown by the graph as air pollution reached 610 micrograms per cubic meter.
In conclusion, 1875 saw the worst air pollution in London according to this graph but it is a good thing that this has improved massively as of 2016.
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