An application requires an RPO under 5 minutes and an RTO under 10 minutes. The database is expected to be about 10 TB and must support failover to a secondary Region. Which database solution meets these business recovery objectives at the LOWEST cost?

The correct answer is deploying an Amazon RDS instance with a cross-Region read replica. This solution effectively meets the RPO (under 5 minutes) and RTO (under 10 minutes) requirements. RDS read replicas are asynchronously updated, typically within seconds, ensuring a low RPO. Promoting a read replica to primary is a quick operation, achieving the RTO. This approach is also cost-effective compared to Aurora Global Database or custom DMS solutions for a 10 TB database. Incorrect options: Aurora snapshots every 5 minutes and copying them cross-Region would be too slow and complex to meet the RPO and RTO, especially for a 10 TB database. Aurora DB clusters in two Regions with AWS DMS would be significantly more expensive and complex than an RDS cross-Region read replica, while not necessarily offering better RPO/RTO for this scenario. An RDS instance with a read replica in the same Region does not provide disaster recovery to a secondary Region, failing to meet the requirement for failover to a secondary Region.