Final answer:
To monitor the route of her child to and from school, Christine should install a GPS tracking device, which is designed for tracking movement and providing real-time location data.
Step-by-step explanation:
Christine should install a GPS (Global Positioning System) device to get information on the route her child takes from home to school and back. GPS tracking is widely used in various forms of technology, including smartphones and dedicated GPS tracking devices, to monitor the location and routes of vehicles or individuals. Unlike CCTV, automobile safety systems, or computer programs with voice recognition, GPS is specifically designed for tracking movement over large areas and can provide real-time location data.