Which determinant- that impacts the aggregate market- would result in the use of fiscal policy?
a)expectations
b)money supply
c)interest rates
d)federal deficit

(usatestprep question for economics)

The controlled use of fire by hominids: (a) limited the expansion of hominids into certain environments, such as dry grasslands. (b) decreased the amount of food energy available in the hominid diet. (c) contributed to geographical expansion and food production techniques in positive ways. (d) has been shown to contribute little to the digestive process of hominids.