Hi my dear friend,
In an article written in Life Magazine, John Foster Dulles then defined his policy of brinkmanship as "The ability to get to the verge without getting into the war is the necessary art." During the Cold War, this was used as a policy by the United States to coerce the Soviet Union into backing down militarily.
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I look it up the answer is A.
Answer:
Correct answer is They were searching for recourse necessary to live.
Explanation:
First option is wrong as early humans weren't that curious to research and exploit lands, as their routine was based on surviving.
Second option is wrong, as they weren't farmers, but hunters and food gatherers.
Third option is correct as they would move to find a place where they could hunt, gather food and find a shelter.
Fourth option is wrong because there was no overpopulation. Actually, most of the Earth was inhabited.