What must be done to allow only users of the devel system group to access a share?
A.
In the smb.conf file, set valid users = @devel
B.
In the smb.conf file, set valid groups = @devel
C.
In the smb.conf file, set valid groups = devel
D.
chgrp the directory on the Samba server to the devel group, and then set the GID bit on the directory.