A team runs an ASP.NET web API on Azure App Service and wants automatic collection of request rates, response times, failure counts, and end-to-end dependency calls to downstream databases, with distributed traces that correlate a single user request across services. Which Azure capability should they enable to gather this application-level telemetry?
- AEnable VM Insights on the underlying compute so the platform collects processor, memory, and disk counters together with a map of network connections between the hosts running the web API.
- BEnable Container Insights for the App Service plan so the platform scrapes container processor and memory usage and surfaces node and pod health for the workload hosting the web API.
- CEnable "Application Insights" for the web API so it auto-collects request and dependency telemetry, failure counts, and correlated distributed traces across the calls a single user request makes. Correct
- DEnable a diagnostic setting that streams the App Service platform logs to a Log Analytics workspace so the team can query raw HTTP server logs and stored console output for the web API.
Why A is wrong: VM Insights gathers guest performance counters and a dependency map for virtual machines, which is tempting for any compute, but it does not capture request rates, traces, or application dependency calls inside the API.
Why B is wrong: Container Insights monitors container and node resource usage for AKS and container workloads, which sounds plausible, but it reports infrastructure metrics rather than the per-request application traces and dependency calls the team needs.
Why C is correct: "Application Insights" is the application performance management service that auto-instruments requests, dependencies, and exceptions and correlates them into end-to-end distributed traces, exactly matching the stated need.
Why D is wrong: Streaming platform logs to a workspace captures coarse HTTP and console output, which is useful, but it provides no automatic dependency tracking or correlated distributed traces across services.