How would education from agricultural colleges assist farmers?

In the 1950s the house of un-american activities committee blacklisted 320 people who are associated with-

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 was a result of the use of farming machines