Who invented and marketed the blue Jeans first?
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Richard James
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Karl Gothe Jansky
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Zacharias Janssen
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Levi Strauss
D
Correct answer
Explanation
Levi Strauss, a German immigrant to America, invented and marketed blue jeans in 1873. He patented the process of riveting pants with Jacob Davis, creating durable workwear that became a cultural icon. Richard James invented the Slinky, Jansky worked with radio astronomy, and Zacharias Janssen with microscopes.