Given the following determine the set A U B n AUB U 1 2 3 4 5 6 7 8 A 1 2 3 7 8 B 1 3 4 6 Select the correct choice below and if necessary fill in the answer box to complete your choic OA A UB n AUB Use a comma to separate answers as needed Use ascending order OB AUB n AUB is the empty set