Which of the Following Is an Example of a Nonequivalent

Multiple Choice

Which of the following is an example of a nonequivalent control group design?

A) examining rates of delinquency in the weeks before and after a new law takes effect
B) comparing rates of delinquency in states with and without a particular law
C) comparing the reoffending rates of juveniles placed on intensive probation with those of similar juveniles on probation
D) both b and c
E) none of the above