Why did korea want to develop its own system of writting ?

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.

During the age of imperialism, suez canal connected which two bodies of water?

What was a northern objection to the kansas-nebraska act?