Cars became popular in 20th century. I think this is the right answer.
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The launch of Sputnik into the Earth's orbit was the most clearly prompted choice that enabled the United States to pursue the Space Race.
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The colony of Pennsylvania was founded by William Penn in 1682, as a safe place for Quakers to live and practice their faith. Quakers have been a significant part of the movements for the abolition of slavery, to promote equal rights for women, and peace.
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