Can anyone me with the true and false questions plz

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.

What from the columbian exchange had perhaps the biggest impact on the world?

What would be considered a secondary source about the assasination of abraham lincoln