The most significant factor that allowed large numbers of nomadic hunters to enter the heart of north america was:

Which quantities decrease as the distance between a planet and the sun increases? check all that apply.

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.

4. any area in which one nation has power over another; i.e. - this happened to china when it was defeated by japan