Correct Answer. B. Security Groups Security Groups in Active Directory are used to assign permissions to resources such as network folders. Reviewing and managing the members of the relevant security groups would help ensure that only authorized users have access to sensitive information.
Option A is incorrect because Organizational Units organize objects in a domain and apply policies but do not directly manage permissions for network resources.
Option C is incorrect because Distribution Groups are used for email distributions and do not relate to security permissions.
Option D is incorrect because the Global Catalog helps in locating directory information across a domain environment but does not manage permissions.