Deploy a duplicate environment excluding Amazon RDS in an alternate Availability Zone. Establish an RDS read replica within this new Zone, and reconfigure the application stack to utilize the local RDS instance. Integrate the new environment into the Route 53 record set using a health check to implement a failover routing policy.

Set up a duplicate environment excluding Amazon RDS in a different AWS Region. Establish an RDS read replica within the new Region, and reconfigure the application stack to utilize the local RDS instance. Incorporate the new environment into the Route 53 record set using a health check to implement a latency-based routing policy.

Create a duplicate environment excluding Amazon RDS in a different AWS Region. In the case of a primary region outage, transfer and restore the most recent RDS snapshot from the primary Region to the DR Region. Modify the Route 53 record set to direct traffic to the ALB in the DR Region.

Construct a duplicate environment excluding Amazon RDS in a different AWS Region. Establish an RDS read replica within the new Region, and reconfigure the new environment to utilize the local RDS instance. Integrate the new environment into the Route 53 record set using a health check to implement a failover routing policy. In the event of a primary region outage, promote the read replica to become the primary database.