Where can't Green Cabs pick up passengers?

Green Cabs, which are designated as for-hire vehicles operating in the outer boroughs of New York City, have specific zones where they can and cannot pick up passengers. The main restriction for Green Cabs is in the Manhattan area.

Cabs are not permitted to pick up passengers south of 96th Street in Manhattan, which is why option D is the correct answer. This zoning rule is in place to manage the flow of transportation choices in Manhattan, where yellow cabs predominantly serve the demand.

In comparison, the other options reference areas where Green Cabs are allowed to operate. North of 96th Street and 110th Street on both the East and West sides fall within their permitted service areas. Thus, Green Cabs may operate freely and pick up passengers in these locations without restriction, adhering to the regulations governing their function.