Final answer:
The access level that sets strict rules on data access in the military is 'Restricted access'. It prevents unauthorized users from accessing sensitive information through security clearances and tight access controls.
Step-by-step explanation:
Often used in the military, the access level that sets strict rules on data access is c) Restricted access. This access level is a part of information security management, which aims to protect sensitive data from being accessed by unauthorized users. Restricted access typically involves measures such as requiring security clearances, implementing role-based access control, or maintaining strict user authentication protocols.
In comparison, administrative access is usually reserved for individuals who manage and control information systems, user access refers to the permissions granted to regular users, and unauthorized access is an attempt to view or manipulate data without proper permission. Thus, 'restricted access' is specifically tailored for scenarios that require a higher level of security, such as military environments.