Is best described as the state and federal courts, judges, lawyers, police, and prisons that are responsible for enforcing criminal law.
a. enforcement of criminal law
b. formal criminal law
c. the criminal justice system
d. the grand jury system

Martha participates in a research study in order to receive extra credit for her psychology class. when she arrives in the research office she is given a can of what looks and tastes like beer, but which actually contains no alcohol. in the adjoining room martha's classmate karen is also participating in the study. karen receives a can of alcoholic beer. if the experiment was designed to test the effects of alcohol on concentration, then who is exposed to the independent variable?