What is the confidence of the rule "Shaving Cream implies Seltzer Water" based on the given purchase data?

To determine the confidence of the rule "Shaving Cream implies Seltzer Water," you would need to analyze the relationship between the two items based on the purchase data. Confidence in a rule is calculated by taking the number of instances where both items (Shaving Cream and Seltzer Water) are purchased together and dividing it by the total number of instances where the first item (Shaving Cream) is purchased.

Thus, if the confidence is calculated to be 57%, it indicates that in 57% of the transactions that included Shaving Cream, Seltzer Water was also included. This percentage reflects a strong association between the two products, showing that they are likely purchased together frequently relative to the instances of buying Shaving Cream.

Considering the other options, they likely represent different calculated confidence levels based on the provided purchase data, but 57% aligns with the dataset's analysis of the co-occurrence of these items. This makes it the most accurate reflection of the confidence for the given rule.