Skull fossils found by the Leakeys advanced our understanding of human evolution. ... Origins of Humankind.......Mary Leakey's discovery of early human ...
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Answer: D
Explanation:
more than 2,000 years ago, 700,000 artisans worked more than 36 years to create an army of terra-cotta warriors to protect Qin Shi Huang, China's first emperor, in his afterlife
It freed them and let them become citizens
The correct answer is of course 3. They had very complex societies.