What credit card is the most used in the purchase of non-alcoholic beer?
credit card that is the most used refers to MAX(COUNT(CreditCardType)); non-alcoholic beer refers to Alcoholic = 'FALSE';
SELECT T2.CreditCardType FROM rootbeer AS T1 INNER JOIN `transaction` AS T2 ON T1.RootBeerID = T2.RootBeerID INNER JOIN rootbeerbrand AS T3 ON T1.BrandID = T3.BrandID WHERE T3.Alcoholic = 'FALSE' GROUP BY T2.CreditCardType ORDER BY COUNT(T2.CreditCardType) DESC LIMIT 1