The correct answer is: D. geographical information system (GIS).
A GIS is a computer system capable of integrating, storing, editing, analyzing, sharing, and displaying geographically referenced (spatial) information. It is a powerful tool that can be used for a variety of purposes, such as mapping, planning, and environmental monitoring.
A personal area network (PAN) is a computer network that connects devices within a very close range, such as within an individual’s home or office. It is typically used to share data and resources between devices, such as printers and file servers.
An interactive voice response (IVR) system is a computer system that uses a telephone to interact with humans. It is typically used to provide customer service or to collect data.
A real-time location system (RTLS) is a system that tracks the location of objects in real time. It is typically used to track assets, such as vehicles or people.
GIS is a more specialized system than PAN, IVR, or RTLS. It is specifically designed for working with spatial data, while the other systems are not. GIS is also more powerful than the other systems, and it can be used for a wider variety of purposes.