Answer: Azure Monitor

Azure Monitor is the correct answer because it allows you to set up alerts based on metrics and log data from Azure resources, including virtual machines. When an administrator stops a VM, this action is recorded in the Azure Activity Log, and Azure Monitor can be configured to detect this event and automatically send alerts via email, SMS, webhooks, or other channels. Azure Service Health (B) focuses on Azure service-wide health and incidents, not individual resource actions. Azure Advisor (A) provides optimization recommendations, not real-time alerting. Azure Network Watcher (D) is for network monitoring and diagnostics, not VM state changes. The community discussion strongly supports C with 92% consensus, high upvotes on explanations, and references to official documentation confirming Azure Monitor's role in VM alerting.

Author: LeetQuiz Editorial Team