A)To protect convoys of merchant ships
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<span>Archimedes’ screw most impacts the Agriculture. The screw was used mostly for transferring water in an irrigation system. It is also used for getting out the water in low area. Archimedes screws are also a big help in plants sewage handling because they manage better with changing amounts of water flow.</span>
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The effect on China was a weakening of the dynasty, although it was temporarily sustained by the Europeans who were under the impression that the Boxer Rebellion was anti-Qing. ... China's defenses were weakened and Dowager Cixi realized that in order to survive, China would have to reform, despite her previous opposition.