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.
$H _ { 1 } : \sigma < 0.629$
n=19
$\alpha = 0.025$

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