What Does the Following Figure Represent $\begin{array}{ll}\mathrm{X} & \mathrm{O}_{1}\\&\mathrm{O}_{2}\end{array}$

What does the following figure represent?
$\begin{array}{ll}\mathrm{X} & \mathrm{O}_{1}\\&\mathrm{O}_{2}\end{array}$
$$

A) One-shot case study design
B) Two-shot case study design
C) True experimental design
D) Static group comparison design