Which of the following is the appropriate formula for calculating the confidence of an association rule? a. Support (A C)/Support (A) b. Number of Occurrences of (A C)/Number of Observations C. Confidence (A C)/Support(C) d. None of the above Which of the following is the appropriate formula for calculating the support of an association rule? a. Support (A C)/Support (A) b. Number of Occurrences of (A C)/Number of Observations c. Confidence (A C)/Support(C) d. None of the above