Which of the following defines 'City' in this context?

In this context, 'City' specifically refers to the City of Chicago, Illinois. This distinction is important because it clarifies the jurisdiction and regulatory framework applicable to operations within O'Hare International Airport. Understanding that 'City' denotes Chicago helps ensure that drivers and operators adhere to local laws, regulations, and airport guidelines that pertain specifically to that geographical location. Other options may describe general urban areas or municipalities but do not apply to the specific context needed for operations at O'Hare, where Chicago's unique regulations and definitions come into play.