Which system is used to track stolen vehicles in the United States?

The National Crime Information Center (NCIC) is the correct answer because it serves as a comprehensive database utilized by law enforcement agencies across the United States to track and manage various criminal information, including stolen vehicles. The NCIC allows law enforcement personnel to enter and access information about stolen vehicles, facilitating the recovery process and enhancing communication between different jurisdictions.

The system is robust and provides a quick reference for officers in the field, enabling them to act promptly when they encounter a vehicle that is reported as stolen. The NCIC's reach is nationwide, making it an essential tool for law enforcement agencies to ensure public safety and to combat vehicle theft effectively.

Other options, such as the Federal Bureau of Investigation (FBI) and the Department of Motor Vehicles (DMV), serve different functions in law enforcement and vehicle registration, respectively, but they do not specifically track stolen vehicles in the same targeted way that the NCIC does. The National Vehicle Theft Bureau (NVTB) is involved in vehicle theft prevention and education but does not function as a primary reporting system for stolen vehicles like the NCIC.