Listen Use the following sets to answer the question. A = {3, 4, 5, 8} B = {5, 6, 7, 8, 9} Which answer shows the union of sets A and B? O {5,8} O {3, 4, 5, 5, 6, 7, 8, 8, 9} O { 4, 5, 8} O {3, 4, 5, 6, 7, 8, 9}