Correct Answer: C
Amazon EC2 is an Infrastructure as a Service (IaaS) for which customers are responsible for the security and the management of guest operating systems.
Options A, B, and D are incorrect as all these resources are part of abstracted services for which AWS is responsible for the security, & infrastructure layer. Customers are responsible for data that is saved on these resources.
For more information on the Shared responsibility model, refer to the following URL:
https://aws.amazon.com/compliance/shared-responsibility-model/