Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

Which of the following statements is correct regarding the chi-squaretest ofindependence?
Option A:The test has a one-sided rejection region.
Option B:The null hypothesis is that the two groups are dependent.
Option C:If there are two categories, each with three levels or groups, there are six\ndegrees of freedom.

Answer: A