Based on the Following ANOVA Summary Table (Fixed Effects) -For Which Source of Variation Is the Null Hypothesis Rejected

Multiple Choice

based on the following ANOVA summary table (fixed effects) :
$\begin{array}{cccc}\hline \text { Source } & d f & \text { MS } & F \\\hline \mathrm{A} & 2 & 15 & 3.0 \\\mathrm{~B} & 3 & 10 & 2.0 \\\mathrm{AB} & 6 & 3 & 0.6 \\\text { Within } & 120 & 5 & \\\hline\end{array}$
-For which source of variation is the null hypothesis rejected at the .10 level of significance?

A) A
B) B
C) AB
D) All of the above.