You are designing a Disaster Recovery (DR) plan for a critical application. The business requires a 'Warm Standby' approach to balance cost and recovery time. How should you architect this in GCP?

Keep the DR region completely empty and deploy the application via Terraform only after a disaster is declared.

Run a scaled-down version of the application in the DR region, and scale it up only when a disaster occurs.

Run the application at full capacity in both regions simultaneously and load balance between them.

Store daily backups in Cloud Storage and restore them to a new region during a disaster.