Nullification is best defined as
A. an opposition to a tariff imposed by the government.
B. the belief that states should have certain rights.
C. a state’s refusal to follow a federal law it opposes.
D. the power split between national and state governments.

An economic system where all or most businesses are owned by government

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.

Arecent challenge to the european union created by a member state is?