If an item set ‘XYZ’ is a frequent item set, then all subsets of that frequent item set are

If an item set ‘XYZ’ is a frequent item set, then all subsets of t

1.	If an item set ‘XYZ’ is a frequent item set, then all subsets of that frequent item set are
A.	undefined
B.	not frequent
C.	frequent
D.	can not say
Answer» D. can not say