A. Create a cross-Region read replica of the DB instance. Promote the read replica at the time of failover. Most Voted
B. Set up SQL replication from the DB instance to an Amazon EC2 instance in the disaster recovery Region. Promote the EC2 instance as the primary server.
C. Use AWS Database Migration Service (AWS KMS) for ongoing replication of the DB instance in the disaster recovery Region.
D. Take manual snapshots of the DB instance in the primary Region. Copy the snapshots to the disaster recovery Region.

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