VM1 fails to start correctly. Which option on the VM1 blade in the Azure portal shows the serial log you can review to diagnose the startup issue?

Boot diagnostics provides a serial log and screenshots of a virtual machine's boot process, which is crucial for diagnosing startup failures. This feature captures console output and allows you to see exactly where the boot process is failing. While "Diagnose and solve problems" is a general troubleshooting blade, it often directs you to specific tools like Boot diagnostics for startup issues. "Change tracking" monitors configuration changes, not boot processes. "Performance diagnostics" focuses on runtime performance, not startup. "Resource health" reports on the overall health and availability of Azure resources, but doesn't provide the detailed boot-level logs needed for this specific problem.