As a GCP Cloud Architect, you are responsible for creating a DR (Disaster Recovery) strategy for a cloud-native application. Your goal is to achieve an RPO (Recovery Point Objective) of 15 minutes and an RTO (Recovery Time Objective) of 1 hour. What GCP services combination is most suitable to meet these objectives?

*Explanation: The best choice for meeting the specified RPO and RTO is Cloud Spanner with a multi-region configuration, coupled with Cloud Functions for automated failover. Cloud Spanner's multi-region configuration provides high availability and resilience, ensuring minimal downtime and data loss, which is crucial for meeting the 15-minute RPO. Additionally, Cloud Functions can be configured for automatic failover, ensuring the system can recover within the 1-hour RTO in case of a disaster. This setup provides a robust and reliable disaster recovery solution, in contrast to other options which may not guarantee the same level of data protection and quick recovery.*