How did genghis khan rise to power and lead the mongols to such success?

according to worldatlas.com, the u.s. has an 86% literacy rate.

a.opium

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a. poison gas was sprayed over battlefields by airplanes to weaken enemy positions before major attacks.

a best description that resulted a division among labor in the early farming communities in their period was there was a change in their society in terms of having social roles to develop and change that led complications and divisions in the society.