A. Nothing - the execute permission cannot be assigned to a directory.

B. The export permission on a directory means that directory can be mounted by a remote server.

C. The exclude permission on a directory means that the directory will not be displayed by the Is command.

D. The execute permission on a directory means you can use the cd command to change into the directory.

E. The exclude permission on a directory means that the files in the directory are hidden.

F. The examine permission on a directory means that you can see the directory's contents.