What feature in the Windows file system allows users to see only files and folders in a File Explorer window or in a list of files from the dir command to which they have been given at least read permission?

Access based enumeration

Explanation:

The access based enumeration is the feature which helps the file system to allow users for seeing the files and folders for which they have read access from the direct command.

Access based enumeration: This feature displays or shows only the folders and files that a user has permissions for.

If a user do not have permissions (Read) for a folder,Windows will then hide the folder from the user's view.

This feature only function when viewing files and folders are in a shared folder. it is not active  when viewing folders and files in a local system.

answer; i believe the correct answer is (a) all trenches must have access/egress;

imma come back to you?