Exam AZ-204 topic 5 question 65 discussion

From this link: https://learn.microsoft.com/en-us/azure/azure-monitor/app/availability?tabs=standard "Automatically enabled availability alerts trigger one email when the endpoint becomes unavailable, and another email when it's available again."

Just creating an alert is necessary but not sufficient. The email is sent from an action group associated with the alert rule.

A is incorrect: Action groups define notification settings but require an alert rule to trigger them. Alone, they won't generate alerts. B is correct: This ensures that failed availability tests trigger email notifications to the subscription owners. C is incorrect: The test must be enabled, but enabling it does not automatically send alerts for failures. D is incorrect: Alerts are not enabled by default, but you must first create an alert rule before enabling alerts.