Which of the Following Is the Most Compelling Justification for a Study

Which of the following is the most compelling justification for a study describing drug use in high school?

A) This study will determine the percentage of high school students who have tried drugs.
B) The researcher believes that drug use is the most important problem facing the schools today.
C) This study will examine high school drug use and prevalence to determine which drugs should be given . priority in informational programs.
D) Student dropout rates and poor achievement are major concerns in society today.