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A company operates a web application hosted on Amazon EC2 instances, which are managed by an Auto Scaling group and are located behind an Application Load Balancer (ALB) across multiple Availability Zones. The application relies on an Amazon RDS for MySQL database instance for data management. The company has set up Amazon Route 53 with an alias record directing to the ALB. Due to a new company policy, a geographically isolated disaster recovery (DR) site is required to ensure an RTO (Recovery Time Objective) of 4 hours and an RPO (Recovery Point Objective) of 15 minutes. Which disaster recovery strategy would best meet these requirements with minimal alterations to the existing application infrastructure?
A
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.
B
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.
C
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.
D
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.