Humans Aren't the Only Animals That Get Cancer, Other Organisms

Humans aren't the only animals that get cancer, other organisms get tumors as well and their risk may be influenced by environmental factors. An ecologist decides to study whether pollution in lakes causes cancer so he collects 100 fish from each of two lakes, one known to be polluted and the other known to be pristine. He then dissects them and determines if they have tumors in their tissues or not. His data is shown below.
​
$\begin{array}{|l|l|l|}\hline & \text { Polluted } & \text { Pristine } \\\hline \text { Tumors present } & 26 & 15 \\\hline \text { No tumors } & 74 & 85 \\\hline\end{array}$
-To determine whether there appears to be a statistically significant relationship between exposure to pollution and risk of developing tumors he decides to conduct a ?² analysis. When performing this analysis, which of the values below is closest to the ?² statistic he would obtain?

A) 3.7
B) 5.7
C) 7.7
D) 9.7