Bismark brought about France's defeat of 1870 by taking advantage of the surge of patriotism among people of Germany, which led to the unification of the southern German troops with the Northern German troops. This led to the formation of a strong army that helped Bismark defeat the opposition army very easily.
A- mixed
Explanation ; In a mixed economy, private and public sectors go side by side. The government directs economic activity in some socially important areas of the economy, the rest being left to the price mechanism to operate.
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The fall of the Aztecs is due to their treatment of others and neighboring civilizations. Hope this helps :)