Suppose ABC is a frequent itemset and BCDE is NOT a frequent itemset. Given this information, we can be sure that certain other itemsets are frequent and sure that certain itemsets are NOT frequent. Other itemsets may be either frequent or not. Which of the following is a correct classification of an itemset?

Question

CDE is not frequent.
ABCDE is not frequent.
BCDEF can be either frequent or not frequent.
AC can be either frequent or not frequent.