A. Create multiple read replicas and put them into an Auto Scaling group.
B. Create multiple read replicas in different Availability Zones.
C. Create an Amazon Route 53 hosted zone and a record set for each read replica with a TTL and a weighted routing policy.
D. Create an Application Load Balancer (ALB) and put the read replicas behind the ALB.
E. Configure an Amazon CloudWatch alarm to detect a failed read replicas. Set the alarm to directly invoke an AWS Lambda function to delete its Route 53 record set.
F. Configure an Amazon Route 53 health check for each read replica using its endpoint.

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