Governance and Finance of U.S. Schools Practice Test

The key idea is that the most direct, stable measure of a large urban school system’s size is how many students it serves. The New York City public school system educates well over a million students, making it the largest district in the United States. That single figure clearly demonstrates the scale of the system and is a widely cited, defining fact.

The other statements touch on budget and staffing, which are indeed large but can vary by year or data source, so they’re less definitive for identifying the system’s size. In contrast, the enrollment figure is the clearest indicator of how expansive the district is, which is why it is the best answer.