Match the Following Four Research Questions with Their Most Effective

Match the following four research questions with their most effective designs (A-D) .
-What are the measurable effects of art therapy for each adolescent's risk of dropping out of "X" Alternative High School over the course of a semester?

A) $\begin{array}{|c|c|c|c|}\hline \text { Random Assignment } & \text { Pretest } & \text { Intervention } & \text { Posttest } \\\hline \text { R } & \mathrm{O} & \mathrm{X} & \mathrm{O} \\\hline \mathrm{R} & \mathrm{O} & & \mathrm{O} \\\hline\end{array}$
B) $\begin{array}{|c|c|c|c|}\hline \text { Random Assignment } & \text { Pretest } & \text { Intervention } & \text { Posttest } \\\hline \text { R } & \mathrm{O} & \mathrm{X}_{1} & \mathrm{O} \\\hline \mathrm{R} & \mathrm{O} & \mathrm{X}_{2} & \mathrm{O} \\\hline \mathrm{R} & \mathrm{O} & & \mathrm{O} \\\hline\end{array}$
C) $\begin{array}{|c|c|c|c|}\hline \text { Random Assignment } & \text { Pretest } & \text { Intervention } & \text { Posttest } \\\hline n / a & \mathrm{O} & \mathrm{X} & \mathrm{O} \\\hline & \mathrm{O} & \mathrm{X} & \mathrm{O} \\\hline &\mathrm{O} & \mathrm{X} & \mathrm{O} \\\hline\end{array}$
D) $\begin{array}{|c|c|c|c|}\hline \text { Random Assignment } & \text { Pretest } & \text { Intervention } & \text { Posttest } \\\hline \text { No } & \mathrm{O} & \mathrm{X} & \mathrm{O} \\\hline \text { No } & \mathrm{O} & & \mathrm{O} \\\hline\end{array}$