Which three are daemons started by the /usr/lib/netsvc/yp/ypstart script on an NIS master server?

Which three are daemons started by the /usr/lib/netsvc/yp/ypstart script on an NIS master server?
(Choose three.)

A.
ypcat

B.
ypbind

C.
ypinit

D.
ypserv

E.
ypxfrd

F.
yprefont