Cual es el conocimiento que nos hace conocer la verdad

This was an order issued during the civil war by president lincoln ending slavery in the confederate states

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 statement best describes the difference between the greek and roman ways of depicting people through their art?