The Public Transportation System in the Toronto Area Conducted a Survey

The public transportation system in the Toronto area conducted a survey that revealed respondents could be assigned to one of four categories: (1) people who never used mass transit, (2) people who used mass transit in the past but not now, (3) people who used mass transit occasionally,and (4) people who used mass transit regularly.These groups have significantly different perceptions about transportation alternatives.Which type of segmentation is this?

A) demographic
B) benefit
C) aggregate
D) usage-rate