Choose all those that apply. In Aproiori Association Rule Mining: a. b. c. d. A. If smaller frequent itemsets are combined to make a bigger itemset, then that bigger itemsetwill always be frequent B. If a bigger itemset is frequent than all its component smaller itemsets are always frequent. C. For a valid rule which meets the confidence requirements, the itemsets on both sides are always frequent. D. support and confidence take frequency of an item into account