Answer:
d. end-use segments.
Step-by-step explanation:
Since in the question it is mentioned that Subway is targetting more markets especially for college students instead of focusing on what McDonald focused on. Their motive is to provide healthy fast food
So here they focused on the consumption patterns, demographic factors, and the psychological factors but not in end-use segments
So the same is to be considered
Hence, the correct option is d. end-use segments