What effect does imagery have on the meaning of this passage about new york?

the commuter dies with tremendous mileage to his credit, but he is no rover. his entrances and exits are more devious than those in a prairie-dog village; and he calmly plays bridge while buried in the mud at the bottom of the east river. the long island rail road alone carried forty million commuters last year; but many of them were the same fellow retracing his steps.

a. by using specific examples that illustrate how many people travel through new york, it explain just how large and grand the city truly is.

b. by describing the many miles a commuter travels, the writer emphasizes the important role they play in new york’s character.

c. the description of how commuters enter and exit the city illustrates the point that commuters do not experience the true new york.

d. the imagery describes the routes of the commuters and how much ground they travel on a day-to-day basis.