What is the primary purpose of the Supremacy Clause? A- to outline why some powers must be implied rather than detailed
B- to explain why state and federal powers are always kept equal
C- to describe the relationship between federal and state powers
D- to declear to America citizens the US is the supreme ruler

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.