The answer would be sound waves.
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c) spread of communism in America
It's still the liberty head nickel
Answer:
Lenin was good in school and learned the Latin and Greek languages. In 1887, he was thrown out of Kazan State University because he protested against the Tsar who was the king of the Russian Empire. He continued to read books and study ideas by himself, and in 1891 he got a license to become a lawyer.
Explanation: