Why did qin shihuangdi force all nobles to live at the capit

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.

Which political organization lobbied government officials to control the immigrant population

What was a result of the use of farming machines