A company's infrastructure includes hundreds of Amazon EC2 instances that use Amazon Elastic Block Store (Amazon EBS). A solutions architect must ensure every EC2 instance can be recovered after a disaster. What should the solutions architect do to meet this requirement with the LEAST amount of effort?

AWS Backup is the most efficient solution for managing backups and restores for hundreds of EC2 instances, requiring the least effort. It centralizes backup policies for various AWS services, including EC2 and EBS, allowing you to define backup schedules, retention policies, and lifecycle management in one place. This eliminates the need for manual snapshot creation or complex scripting. The AWS Backup API and CLI provide programmatic access for orchestrating restores at scale, which is crucial for a large number of instances. Taking manual EBS snapshots and using CloudFormation or Elastic Beanstalk would require significant manual effort or complex automation to manage hundreds of instances and their associated volumes. Similarly, creating custom Lambda functions for snapshotting and restoring, while possible, introduces custom code to maintain and manage, which is more effort than leveraging a managed service like AWS Backup.