In a study of effects of alcohol on driving ability, the control group should be given
a. a high dosage of alcohol.b. one-half the dosage given the experimental group.
c. a driving test before and after drinking alcohol.
d. no alcohol at all.
To keep a group in control no alcohol should be given.
A high dosage of alcohol would not be controlled.
Any alcohol given would be considered uncontrolled and dangerous.