What might a server do when it receives a request for a URL that refers to a directory?

What might a server do when it receives a request for a URL that refers to a directory? (Choose three)

A.
It may return a default document

B.
It may display the root directory

C.
It may generate an error and refuse the request

D.
It may display the directory with an execute permission

E.
It may return a formatted directory listing to the browser