K Let U={1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16), A=(3,7,8,11,12,13,14,15,16), B={1,3,4,5,7,9,12,13,15), and C (1,2,6,7,10,11,12,13,16). Find (C-B) n (C-A). Select the correct choice below and, if necessary, fill in the answer box to complete your choice. OA. (C-B) n (C-A) = {} (Use a comma to separate answers as needed.) OB. (C-B) n (C-A)=(0)