Help me please!:( I'll guve brainliest!​

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.

Poland a: nato b: warsaw pact c: not a member of either alliance

Who was the founder of taoism whose name means "the old master"? a. laozi c. hanfeizi b. wu wang d. wu wudi