Final answer:
Senz segments the consumer market based on demographic variables, specifically targeting lower-income consumer groups, which indicates a focus on income level within the demographic factors.
Step-by-step explanation:
The automobile manufacturer Senz, which focuses on producing low-end vehicles for lower-income consumer groups, most likely segments the consumer market based on demographic variables. Demographics involve statistical data relating to the population and the particular groups within it, such as income, age, gender, and education level. In Senz's case, targeting lower-income consumer groups is a clear indication of using income level, which is a demographic factor, to segment the market.