Question: In the context of Performance Management (PM) Integration Reference Point (IRP), what is the primary purpose of the `notifyThresholdMonitorStatusChanged` notification, as initiated by the PMIRP Agent?
Option 1: To periodically update IRP Managers on all active measurement jobs across the network.
Option 2: To inform subscribed IRP Managers about changes in the status of a Threshold Monitor (e.g., from Suspended to Active or vice versa).
Option 3: To request configuration updates for Threshold Monitors from IRP Managers.
Option 4: To acknowledge receipt of measurement data by the PMIRP Agent from various network elements.
Explanation: The `notifyThresholdMonitorStatusChanged` notification is specifically designed to alert subscribed IRP Managers about changes in a Threshold Monitor's status, such as transitioning from Suspended to Active or from Active to Suspended, ensuring managers are always aware of the current monitoring state for effective performance management.