1. The problem asks which variable is categorical among the given options. 2. A categorical variable is one that describes a quality or characteristic and can be divided into groups or categories. 3. Let's analyze each option: - A) Total household income is numerical (quantitative). - B) Number of people in the household is numerical (quantitative). - C) The city the respondent lives in is categorical because it names a category or group. - D) Age of the respondent is numerical (quantitative). 4. Therefore, the categorical variable is option C. Final answer: C) the city the respondent lives in