A user is attempting an ftp connection to a server. A check of the server show the ftp service is online. Which file should you check on the ftp server to see if this user is allowed to use ftp?

A.
/etc/ftpd/ftpusers

B.
/etc/default/ftpusers

C.
/etc/ftpd/ftp.deny

D.
/etc/ftpusers