Which method separates modern historians from ancient greek historians

Which is the main inference that can be drawn from adam smith's book the wealth of nations? a) for an economy to work flawlessly, it shouldn't have to serve and moral goals.b) the government must control a free-market economy, or economic problems will arise.c) a free-market economy works well only without the government's interference. d) free trade will only hurt economies and should be stopped by governments.

Which physical feature minimizes population density in northern africa?

What were some effects in world war 1 in europe ? ( and only in europe)