The data engineering team has set up a Databricks SQL query and alert to monitor a Delta Lake table named recent_sensor_recordings, which includes sensor_id, timestamp, and temperature for the latest 5 minutes of recordings.
The below query is used to create the alert:

SELECT MEAN(temperature), MAX(temperature), MIN(temperature)
FROM recent_sensor_recordings
GROUP BY sensor_id

The alert uses the following query (set to refresh every minute and complete in under 10 seconds) and triggers when mean(temperature) > 120, with notifications sent at most once per minute.

If this alert fires notifications for 3 consecutive minutes and then stops, which statement must be true?