Which event finally brought the united states into world war 2?

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 is political gerrymandering, what does is accomplish, and why might legislators use this tactic in redistricting

What is the relation between the hover dam and the gold rush