Which AWS service should the company use to achieve this goal?

Explanations:

AWS Config is primarily used for resource inventory, compliance checking, and configuration history, not for troubleshooting or debugging applications.

AWS CloudFormation is a service for deploying and managing infrastructure as code. It does not provide capabilities for troubleshooting or debugging applications.

AWS X-Ray is specifically designed for debugging and analyzing serverless applications. It provides insights into performance bottlenecks and error rates, helping developers trace requests through their application.

AWS CloudTrail is used for logging and monitoring account activity across AWS infrastructure. While it can provide insights into API calls and usage patterns, it does not focus on application debugging.