Final answer:
Coffee Ince is most likely using geographic segmentation to target cities with populations of 50,000-99,000 in North America.
Step-by-step explanation:
The segmenting dimension most likely being used by Coffee Ince to target cities with populations of 50,000-99,000 in North America is geographic.
Geographic segmentation involves dividing a market based on geographical factors such as location, climate, or population density. Coffee Ince is specifically targeting cities with a certain population range, which falls under geographic segmentation.