A vernal-pool checkout wants a “promo_applied” business event plus a custom metric in Application Insights. How should the developer emit that telemetry?
Select an answer to reveal the explanation.
Short Explanation
Custom events and metrics ride the same Insights resource—name the business signal and track it. Do not spawn a resource per button or hide in Redis.
Full Explanation
Application Insights auto-collects requests and dependencies; custom events and custom metrics extend that model for business signals such as promo_applied. Emit them via the official instrumentation APIs against the existing resource. Creating a resource per UI control or substituting Redis is incorrect.