A developer creates a customer managed key for multiple AWS users to encrypt data in Amazon S3. The developer configures Amazon Simple NotificationService (Amaz...

A developer creates a customer managed key for multiple AWS users to encrypt data in Amazon S3. The developer configures Amazon Simple NotificationService (Amazon SNS) to publish a message if key deletion is scheduled. The developer needs to preserve any SNS messages that cannot be delivered so that those messages can be reprocessed.
Which AWS service or feature should the developer use to meet this requirement?

A. Amazon Simple Email Service (Amazon SES) B. AWS Lambda C. Amazon Simple Queue Service (Amazon SQS) D. Amazon CloudWatch alarm