What does each conflict monitor have that makes it unique for its particular intersection?

Answer: B — Program card

Each conflict monitor is equipped with a program card that provides unique configuration settings tailored specifically for its particular intersection. This program card holds vital information such as the timing sequences, operational parameters, and any specific settings that relate to the specific traffic patterns and conditions of that intersection. By having a distinct program card for each monitor, it ensures that the traffic signals can operate optimally based on the unique traffic scenarios they encounter, improving safety and efficiency at the intersection. This customization is crucial for the effective management of traffic and for responding appropriately to the various conditions that might arise in different locations. Other options, while valuable components of traffic signal systems and possibly contributing to their overall functionality, do not encapsulate the unique aspect of each conflict monitor as effectively as the program card does.