The correct answer is B, AWS CloudFormation. AWS CloudFormation is a service designed to allow resource lifecycles to be managed in a repeatable, predictable, and safe manner. It supports automatic rollbacks, automated state management, and management of resources across accounts and regions. Users can define their infrastructure configuration in a template file written in YAML or JSON format, which describes the desired state of AWS resources. By deploying the CloudFormation stack, the infrastructure is automatically provisioned based on the template, ensuring consistency and reducing manual configuration. This service is specifically built for infrastructure-as-code principles, making it the appropriate choice for deploying services in the AWS Cloud using IaC.