<span>oil production. hope this helps:)
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Ming Emperor Hongwu (Ju Yuanzhang) became emperor after the mongols were driven out of China.
Hope this helps! :D
Answer:
They could have decreased protectionism. Protectionism means that they limited free trade between nations and restricted trade of foreign goods. Protectionism is widely accepted as maybe the biggest reason for the development of the Great Depression and thus if the US had decreased it, it most likely would not have happened at all.
