The answer is the Aztecs(C)
Keep Russia in World War 1!
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Boats and railroads were improved with the use of steam power.
The Second New Deal is the term used by commentators at the time and historians ever since to characterize the second stage, 1935–36, of the New Deal programs of President Franklin D. Roosevelt.
Mercantilism is really the idea that trade generates wealth, so i would have to say 3. establishment of subsistence agriculture