the answer to your question is, B. Maya is the correct answer
Canyons are formed by erosion
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By the 20th century, Britain had put into effect its modern Welfare State. ... As the industrial revolution transformed Britain—populations increased, migrating to expanding urban areas to take up new jobs in ever increasing numbers—so the system to support people also evolved.
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When Woodrow Wilson took office, he wished he would not have to spend much time on foreign affairs. When World War I erupted in 1914, he fist saw the US role as a peace broker. Nevertheless, he changed his mind, as many in the public opinion did, after a German U-boat sank the liner Lusitania.
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