Find set

HW Score: 20%, 3 of 15 point O Points: 0 of 1 Given the following sets, find the set (A U B)'n C. U = {1, 2, 3, , 9} A = {1, 2, 3, 4} B = {3, 4, 9} C = {1, 4, 5, 6, 7} Select the correct choice below and, if necessary, fill in the answer box to complete your choice O A. (A UB)' nc= 1 (Use a comma to separate answers as needed. Use ascending order.) O B. (A UB)'n C is the empty set