Final answer:
Zerex is using geographic segmentation to market its radiator liquid as a coolant in the South and an antifreeze in the North.
Step-by-step explanation:
Zerex is using the geographic segmentation variable by marketing its radiator liquid as a coolant in the South and an antifreeze in the North. Geographic segmentation involves dividing the market based on geographic location, such as regions, countries, or climate conditions.
In this case, Zerex is tailoring its product offering based on the different needs and preferences of consumers in the North and South regions. Antifreeze is more necessary in the North due to colder temperatures, while coolants are more suitable for the South's warmer climate.
By using geographic segmentation, Zerex can better meet the specific needs of customers in different regions.