What must occur for the ActiveEvent control to function properly?

For the ActiveEvent control to function properly, at least one event must be defined. This is essential because the purpose of the ActiveEvent control is to monitor and report on specific events as they occur within the system. Without predefined events, the control would have no context or data to operate on, rendering it ineffective. The events typically represent significant occurrences in the operational process, and it’s these events that the control leverages to provide meaningful outputs and alerts to users.

In contrast, the other options focus on different aspects that are not prerequisites for the functioning of the ActiveEvent control. While connectivity to a database may enhance functionality by allowing for additional data interactions, it is not strictly necessary for basic event monitoring. On the other hand, the idea that only one event can be active or that continuous internet access is required does not reflect the fundamental operational requirements of the ActiveEvent control. The key takeaway is the necessity of defining at least one event to ensure that the ActiveEvent control can carry out its intended function of monitoring and providing information on those events.