<span>oil production. hope this helps:)
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I believe the answer is A. He developed the idea of the "invisible hand" of the free market, which continually keeps the economy on course. This can be found in his book "<span>The Wealth of Nations".
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Hope this Helps! :)
Answer:
The Mongol Empire was noted for its sheer military power, a rapid communication system based on relay stations, paper currency, diplomatic immunity and safe travel under Pax Mongolica. These features facilitated the growth, strength and flexibility of the Empire in responding to ever-changing circumstances.
Explanation:
