Amazon Data Lifecycle Manager (DLM) is a managed service designed to automate the creation, retention, and deletion of Amazon EBS snapshots. A key feature of DLM is the ability to define policies that automatically copy snapshots to other AWS Regions for disaster recovery purposes. This approach directly meets the requirements of copying snapshots to two additional Regions while imposing the lowest possible operational overhead, as it is a fully managed, "set-and-forget" solution that does not require writing or maintaining custom code.

B. This is a viable but less optimal solution. It requires writing, deploying, and maintaining a custom AWS Lambda function, which results in higher operational overhead compared to using a managed service like DLM.

C. This option is technically incorrect. While AWS Backup can create and copy EBS snapshots, you cannot use Amazon S3 cross-Region replication (CRR) directly on EBS snapshots, as they are not stored in user-managed S3 buckets.

D. Amazon EC2 Image Builder is a service for creating and managing golden Amazon Machine Images (AMIs), not for backing up individual EBS volumes. Using it for this purpose is inefficient and misaligned with the stated requirement.

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1. Amazon Data Lifecycle Manager User Guide: "With Amazon Data Lifecycle Manager

you can automate the creation

retention

and deletion of snapshots taken of your Amazon EBS volumes... You can also set up policies to create EBS-backed AMIs and to copy snapshots to other Regions for disaster recovery." (Source: AWS Documentation

Amazon Data Lifecycle Manager User Guide

"What is Amazon Data Lifecycle Manager?")

2. Amazon Data Lifecycle Manager User Guide

Cross-Region copy: "For disaster recovery purposes

you can create snapshot lifecycle policies that automatically copy snapshots to up to three AWS Regions." This section details the configuration steps

confirming it as a built-in

low-overhead feature. (Source: AWS Documentation

Amazon Data Lifecycle Manager User Guide

"Cross-Region copy")

3. Amazon EBS User Guide

Copy an Amazon EBS snapshot: "When you copy a snapshot

you create a new

identical snapshot in the destination of your choice... You can copy snapshots within the same AWS Region or from one Region to another." This describes the underlying API action (CopySnapshot) that services like DLM and AWS Backup use

and it makes no mention of S3 CRR. (Source: AWS Documentation

Amazon EBS User Guide

"Copy an Amazon EBS snapshot")

4. AWS Backup Developer Guide

Copying a backup: "You can copy backups to other AWS Regions... A copy can be created on-demand or automatically as part of a scheduled backup plan." This confirms AWS Backup's capability but does not validate the incorrect mechanism (S3 CRR) proposed in option C. (Source: AWS Documentation

AWS Backup Developer Guide

"Copying a backup")