A Researcher Wishes to Determine If There Is a Relationship

A researcher wishes to determine if there is a relationship between the age of working individuals and the amount of coffee consumed. The following data were obtained for the number of cups of coffee consumed per day:

$\begin{array}{clll} & \mathbf{2} \text { cups or fewer } & \mathbf{6} \text { cups or more } & \text { Total } \\35 \text { years } & 20 & 5 & 25 \\35 \text { or older } & 19 & 21 & 40\end{array}$

Choose the best option from the choices below:

A) A z-test statistic could be used to test the null hypothesis.
B) A chi-square test statistic could be used to test the null hypothesis.
C) Either a z-test or a chi-square test could be used to test the null hypothesis.
D) A t-test statistic could be used to test the null hypothesis.