The empirical method of study is based on a. statistics b. guesswork c. practice d. observation

The united states constitution gives the the power to regulate interstate commerce.

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.

In the case of furman v. georgia (1972), the united states supreme court ruled that the death penalty- in specific cases- being arbitrarily and inconsistently imposed, often in a discriminatory manner. as a result, the imposition of the death penalty as a punishment was stopped throughout the united states.