In an Experiment on the Effect of Alcohol on Performance,subjects

Multiple Choice

In an experiment on the effect of alcohol on performance,subjects are randomly assigned to drink different amounts of alcohol before completing a performance task.This means that ____.

A) the researcher assigned subjects to each level of the independent variable based on their performance level
B) the subjects chose the level of the independent variable they would receive
C) each subject had an equal chance of being assigned to each level of the independent variable
D) each subject had an equal chance of being assigned to each level of the dependent variable