You are the administrator of a Windows network. When creating a new user account, you specify a security clearance level of top secret so that the user can access classified files. What type of access control method is being used?

MAC (Mandatory access control)

Explanation:

Mandatory access control is a type of access control. MAC is a strategy that are defined by system administration. MAC access is controlled by administration. Administrative security access training, security awareness, written policies and procedures, incident response plan, agreements and background checks.