Refer to the Exhibit.
Which two are true? (Choose two.)
A.
Every Dippy must be associated with at least one Zippy.
B.
Every Dippy must be associated with exactly one Zippy.
C.
It is valid for a Zippy to be associated with more than one Dippy.
D.
It is valid for a Zippy to have no associated Dippy.
E.
Every Zippy must be associated with exactly one Dippy.
F.
It is valid for a Dippy to have no associated Zippy.