What was a primary motivation for American pioneers to travel to the Southwest?

One argument of those who supported the gold standard system in the united states was that the gold standard

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 immediate cause of the panic of 1837