Final answer:
The 'Special' user permission is specific to 'production' environments and deployment to sandboxes will fail.
Step-by-step explanation:
The correct answer to the question is A. The Special user permission only exists in production environments and will fail if you try to deploy it to sandboxes. This user permission is designed to give access to features and functionalities that are specific to the production environment of a software application or features that are not needed or not functional in a sandbox, which is typically used for testing and development purposes.