this pAssAgE is mAinly ABout _______.
A．how AvErAgE AmEriCAns viEw thEir EConomiC systEm
B．thE rolE oF thE govErnmEnt in thE AmEriCAn EConomy
C．how supply AnD DEmAnD DEtErminE priCEs in thE AmEriCAn EConomy
D．thE rolEs oF thE puBliC AnD privAtE sECtors in thE AmEriCAn EConomy