A Study Prospectively Examined Whether Sleep-Disordered Breathing Was Associated with an Increased

A study prospectively examined whether sleep-disordered breathing was associated with an increased risk of death from any cause in a cohort of 6294 adults participating in the Sleep Heart Health Study. Study participants were classified into four groups depending on the extent of their sleep-disordered breathing (none, mild, moderate, or severe) . The counts of deaths over the course of the study are reported for each group in the following two-way table.
$$\begin{array}{l}\begin{array} { | l | r r r r | } \hline &{ \text { sleep-disordered breathing } } \\& \text { none } & \text { mild } & \text { moderate } & \text { severe } &\text { total }\\\hline \text { death } & 476 & 320 & 165 & 86&1047 \\\text { no death } & 2953 & 1477 & 562 & 255&5247 \\\hline \text { total } & 3429 & 1797 & 727 & 341 \\\hline\end{array}\end{array}$$ We want to know whether the study findings give evidence of a significant relationship between the extent of sleep-disordered breathing and death. Under the null hypothesis of no relationship, what is the contribution to the chi-square statistic (i.e., chi-square component) that comes from the severe sleep-disordered breathing and death cell?

A) 0.17
B) 0.29
C) 15.11
D) 56.72