You migrated your applications to Google Cloud Platform and kept your existing monitoring platform. You now find that your notification system is too slow for time critical problems.
What should you do?

A. Replace your entire monitoring platform with Stackdriver. B. Install the Stackdriver agents on your Compute Engine instances. C. Use Stackdriver to capture and alert on logs, then ship them to your existing platform. D. Migrate some traffic back to your old platform and perform AB testing on the two platforms concurrently.