Correct Answer is D
The AWS Documentation mentions the following
AWS OpsWorks is a configuration management service that helps you configure and operate applications in a cloud enterprise by using Puppet or Chef. AWS OpsWorks Stacks and AWS OpsWorks for Chef Automate let you use Chef cookbooks and solutions for configuration management, while OpsWorks for Puppet Enterprise lets you configure a Puppet Enterprise master server in AWS. Puppet offers a set of tools for enforcing the desired state of your infrastructure, and automating on-demand tasks
Option A is invalid because this service is good for quickly provisioning environments but does not have out of the box support for the Chef tool
Option B is invalid because this service is used for developing templates which represent Infrastructure as code
Option C is invalid because this is the underlying compute service
For more information on AWS Opswork, please refer to the below URL
https://docs.aws.amazon.com/opsworks/latest/userguide/welcome.html
So, The correct answer is: AWS Opswork