What is the curse oedipus lays upon the killer of laius?

Why did moshe the beadle tell people on his return from being deported?

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 are the 6 steps in the scientific method