Find the Critical Value or Values Of $\chi ^ { 2 }$

Multiple Choice

Find the critical value or values of $\chi ^ { 2 }$ based on the given information.
$\begin{array} { l } H _ { 1 } : \sigma < 0.629 \\n = 19 \\\alpha = 0.025\end{array}$

A) $8.231$
B) $31.526$
C) $7.015$
D) $8.907$