The economic boom and the financial speculation of the 1920s were caused by what

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.

What is a key believes of john locke in establishment of government

What are some inventions during the han dynasty?