Which of the following describes a demographic variable?

Demographic variables are quantitative characteristics of a population that can be measured and categorized. They include specific traits such as age, gender, income level, education, marital status, and occupation. These variables provide marketers with essential information about the consumption patterns and preferences of different segments of the population. Understanding demographics allows businesses to tailor their products, services, and marketing strategies to effectively meet the needs of various consumer groups.

The other choices do not accurately describe demographic variables. Consumer trends based on popular culture relate to social dynamics rather than specific demographic traits. Buying behaviors based on personal interests focus on psychographic variables, which are more about attitudes and lifestyle than measurable demographics. Marketing strategies targeting social groups involve a broader social or cultural context, rather than the specific, quantifiable characteristics that demographic variables encompass. Thus, the choice that highlights age, gender, and income distinctly aligns with the definition of demographic variables.