Your organization requires a disaster recovery plan with Recovery Time Objective (RTO) of 15 minutes and Recovery Point Objective (RPO) of 5 minutes for a critical web application. Which architecture best meets these requirements?

Correct answer: Azure Site Recovery replication with traffic manager for automated failover

Option D is correct because Azure Site Recovery provides continuous replication of virtual machines and workloads to a secondary region, and combined with Azure Traffic Manager's automated failover routing, it can meet a 15-minute RTO through orchestrated failover and a 5-minute RPO through near-synchronous replication. Option A is incorrect because daily backups with manual failover would produce an RPO measured in hours and an RTO dependent on human response time, far exceeding the 5-minute RPO and 15-minute RTO targets. Option B is incorrect because read-only replicas with 10-minute scheduled replication already violates the 5-minute RPO requirement, and failover from a read replica typically requires manual promotion steps. Option C is incorrect because manual data copies every 5 minutes could theoretically meet the RPO but rely on human action for failover, making the 15-minute RTO unreliable, and this approach lacks the orchestration and automation that Azure Site Recovery provides.