Final answer:
Internal users with the ability to directly interact with and control infrastructure devices have direct access. This access level is typically granted to IT administrators in an organization.
Step-by-step explanation:
The question asks about the level of access internal users have to infrastructure devices. If internal users have direct access to the infrastructure devices, the correct answer would be A. Direct access. This means that internal users are able to interact with and control the infrastructure devices without any intermediary systems or restrictions. This level of access is generally provided to IT administrators or employees within an organization who manage and maintain the infrastructure.