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AWS Certified Solutions Architect - Professional · AWS
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Aurora Global Database provides cross-Region disaster recovery with the lowest RTO (<1 minute) and RPO (<1 second). Other options are either limited to a single Region, rely on slower asynchronous replication, or require manual failover, which cannot meet the strict requirements.
Its B sure.
B. Not the cheapest, but the other ones are either not cross-regional or can't handle the RTO/RPO.