Use U= {1, 2, 3, 4, 5, 6, 7, 8, 9, 10), A=(2, 3, 4), B = {4, 6, 8, 9), and C=(3, 4, 9} to find the given set. A ETCH Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. A={} (Use a comma to separate answers as needed.) OB. The solution is the empty set. Help me calue the 4