There were multiple significant social movements after World War I including:
1) Harlem Renaissance- This movement revolved around the explosion of African-American music, art, writing, and culture. During this era, many African-American citizens lived in big cities (like Harlem) and used their talents in order to captivate American citizens. This was a small step towards improved relations between white and black citizens, as they found common interests in things like jazz music.
2) Women's Rights Movement- Women played a significant part in the war effort during World War I. This prompted many women to demand more rights, especially voting rights. This movement that started right after World War I resulted in the passing of the 19th amendment, which granted women the right to vote.
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A characteristic of American companies in the 1920´s was the massive production in order to cover the demand of new products such as: cars; vacuum cleaners; washing machines and radios among other goods. This massive production forced the demand on labor and the US began to change from being rural and agricultural to urban and industrial.
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The germinated seed incorporated a small amount of modern carbon. Correct: Incorporation of a small amount of modern carbon would increase the relative amount of carbon-14 and reduce the estimated age of the seed by 250-300 years.
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Germany's militarization of the Rhineland, annexation of Austria, and aggression against Czechoslovakia, the Stalin-Hitler Pact of 1939, and the German attack on Poland. Like Italy and Japan, German aggression came from a need for resources, a desire to expand or gain back former land, and extreme nationalism.