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All of the following were invented before 1840, EXCEPT. A) power loom. B) zipper. C) cotton gin. D) mechanical reaper

All of the following were invented before 1840, EXCEPT. A) power loom. B) zipper. C) cotton gin. D) mechanical reaper
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All of the following were invented before 1840, EXCEPT. A) power loom. B) zipper. C) cotton gin. D) mechanical reaper

User Guz
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All of the choices given were invented before 1840 except for the zipper. The zipper was invented in 189. The correct answer is B. 
User Kareemostafa
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