In the AWS shared responsibility model, customers fully inherit physical and environmental controls from AWS. This means that AWS is responsible for the security and management of the underlying infrastructure, including the data centers, networking, and power systems. AWS implements stringent physical and environmental controls to ensure the security and availability of their infrastructure. The correct answer is C, as it reflects the controls that are fully managed by AWS and inherited by the customer. Options A, B, and D represent areas where the customer has shared or individual responsibilities, such as patching guest operating systems and applications (A), training their own employees (B), and managing the configuration of their own systems (D).