Let U be the set of all integers from 1 to 20. Let A = {1, 3 , 6 , 9, 12, 15, 18) and B = {2, 9, 11, 20}. Which choice below describes the set (4, 5, 7, 8, 10, 13, 14, 16, 17, 19}? o -(AUB) o -(An B) O AN B O AUB

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