A Psychologist Was Looking at the Effects of an Intervention $\quad$

A psychologist was looking at the effects of an intervention on depression levels. Three groups were used: waiting list control, treatment and post-treatment (a group who had had the treatment 6 months before) .
-Based on the output for these tests, what should the researcher conclude? $\quad$$\quad$ Test of Homogeneity of Variances

BDIDIF
$\begin{array}{|c|r|r|r|}\hline \begin{array}{l}\text { Levene } \\\text { Statistic }\end{array} &{\text { df1 }} &{\text { df2 }} & \text { Sig. } \\\hline 4.246 & 2 & 45 & .020 \\\hline\end{array}$

A) The treatment group was significantly different from the control group but not the post-treatment group, and the post-treatment group was significantly different from the control group.
B) The treatment group was significantly different from the post-treatment and control group, and the post-treatment group was significantly different from the control group.
C) The treatment group was significantly different from the control group but not the post-treatment group, and the post-treatment group was not significantly different from the control group.
D) The post hoc tests are inconclusive.