A company must manage costs and control the size of an existing Amazon DynamoDB table without interrupting ongoing reads or writes. They want data to be automatically removed after 1 month with minimal maintenance. Which approach meets these requirements?

DynamoDB's Time To Live (TTL) feature is the most efficient and cost-effective solution. It automatically deletes items after a specified timestamp, requiring minimal maintenance and incurring no additional read/write costs for the deletion process itself. This ensures ongoing reads and writes are not interrupted. Scheduling an EventBridge rule to invoke a Lambda function that scans and deletes items would incur read costs for the scan and write costs for each deletion, and it's less efficient than TTL. Enabling DynamoDB Streams to trigger a Lambda is designed for real-time data processing, not for periodic cleanup of old data, and would also incur read/write costs. Running a periodic Lambda function to scan and delete is similar to the EventBridge approach, incurring unnecessary read/write costs and being less optimized than TTL.