An image-processing company has a web application that uploads images to an Amazon S3 bucket. S3 event notifications publish object-creation events to an Amazon Simple Queue Service (Amazon SQS) standard queue. The SQS queue is the event source for an AWS Lambda function that processes images and emails results to users. Users report receiving multiple emails for each uploaded image. A solutions architect finds that SQS messages are invoking the Lambda function more than once, causing duplicate emails. What should the solutions architect do to resolve this issue with the LEAST operational overhead?

The correct answer is to increase the visibility timeout in the SQS queue. When a Lambda function processes a message from an SQS queue, the message becomes temporarily invisible to other consumers. If the visibility timeout is too short, the message can become visible again before the Lambda function finishes processing and deletes it. This can lead to the message being processed multiple times by the same or different Lambda invocations, causing duplicate emails. Setting the visibility timeout to be greater than the Lambda function's timeout and any batch window ensures the function has enough time to process and