A company has applications that process transaction requests multiple times each minute. The applications write transaction data to a single Amazon RDS DB instance. As the company begins to process more transactions, the company becomes concerned that it has no failover solution in place for disaster recovery (DR). The company needs the DB instance to fail over automatically without losing any committed transactions. Which solution will meet these requirements?

Topic #: - All AWS Certified SysOps Administrator - Associate Questions

A. Create an RDS read replica in the same AWS Region. Configure an AWS Lambda function to promote the replica as the primary DB instance during a DR scenario.
B. Create an RDS read replica in a different AWS Region. Configure an AWS Lambda function to promote the replica as the primary DB instance during a DR scenario.
C. Modify the DB instance to be a Multi-AZ deployment.
D. Setup an Amazon CloudWatch alarm that monitors the DB instance memory utilization with a threshold greater than 90%. Invoke an AWS Lambda function to restart the DB instance.

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