A company must retain user transaction data in an Amazon DynamoDB table for 7 years. What is the MOST operationally efficient solution that satisfies this requirement?

AWS Backup is the most operationally efficient solution because it provides centralized, automated backup and retention management for various AWS services, including DynamoDB. You can define backup policies with a 7-year retention period directly within AWS Backup, eliminating manual processes. DynamoDB point-in-time recovery is for continuous backups up to 35 days, not 7 years. Creating on-demand backups via the console and storing them in S3 with a lifecycle policy requires manual intervention for each backup or complex automation, making it less efficient. Similarly, using EventBridge and Lambda to trigger backups to S3 is a custom solution that requires development and maintenance, increasing operational overhead compared to the native AWS Backup service.