You need to develop procedures to test a disaster plan for a mission-critical application. You want to use Google-recommended practices and native capabilities within GCP. What should you do?

The correct answer leverages Google-recommended practices and native GCP capabilities for disaster plan testing. Deployment Manager is the infrastructure as code (IaC) service in GCP, ideal for automating the provisioning and configuration of resources consistently, which is crucial for testing disaster recovery scenarios. Stackdriver (now part of Google Cloud's operations suite, including Cloud Monitoring and Cloud Logging) provides comprehensive monitoring, logging, and debugging capabilities, essential for observing system behavior and identifying issues during disaster recovery tests. Using gcloud scripts, while functional, is less robust and scalable for infrastructure provisioning compared to Deployment Manager, which offers declarative configuration and state management. Activity Logs primarily record administrative activities and data access events, making them less suitable for detailed operational monitoring and debugging of application and infrastructure performance during a test compared to the full suite of Stackdriver tools.