Answer: A
Option A is CORRECT. AWS CodeCommit helps in hosting git-based repositories securely. AWS CodeCommit is a fully managed service and provides source control services.
Option B is INCORRECT. AWS CodeStar is a cloud-based AWS service that helps in swift and quick development and building and deploying applications in AWS.
Option C is INCORRECT. Amazon CodeGuru is an ML-powered development tool that provides code quality improvement recommendations.
Option D is INCORRECT. AWS CodePipeline is a fully managed workflow management tool that facilitates automation of various phases of the release process.
Reference:
https://aws.amazon.com/codecommit/
https://aws.amazon.com/codestar/
https://aws.amazon.com/codeguru/
https://aws.amazon.com/codepipeline/