Explanation: Access control helps an organization implement effective access control. They ensure that users have the rights and permissions they need to perform their jobs, and no more. It includes principles such as least privilege and separation of duties.
Incorrect Answers:
A: System and Communications protection control is a large group of controls that cover many aspects of protecting systems and communication channels. Denial of service protection and boundary protection controls are included. Transmission integrity and confidentiality controls are also included.
B: Audit and Accountability control helps an organization implement an effective audit program. It provides details on how to determine what to audit. It provides details on how to protect the audit logs. It also includes information on using audit logs for non-repudiation.
D: Identification and Authentication control cover different practices to identify and authenticate users. Each user should be uniquely identified. In other words, each user has one account. This account is only used by one user. Similarly, device identifiers uniquely identify devices on the network.