As the deployment architect, what is the recommendation to satisfy the customer requirements?

Universal Containers CUC) is embarked on an enterprise salesforce transformation journey, UC would like to streamline and automate deployment to different sandboxes during the build phase. Upon customer acceptance in UAT, the company requested to automate the production deployment as well.

As the deployment architect, what is the recommendation to satisfy the customer requirements?
A . Recommend using the Continues integration and the Continues deployment tool and build the pipeline to deploy to sandboxes and production.
B. Recommend using SFDX and documents the deployment commands with steps to be executed for each environment.
C. Recommend using the ANT script and build a custom application to run the script and use change sets to deploy supported metadata.
D. Recommend using an AppExchange solution that packages the deployment
components and you can run the deployment wizard to track deployment result.

Answer: A