Given the sets: A = {1, 2, 3, 6, 7, 9} and B = {2, 4, 6, 7, 8}. Find (A*upside down U*B).
O A. {1, 4, 8, 9}
OB. {1, 2, 2, 3, 4, 6, 6, 7, 7, 8, 9}
O C. {1, 2, 3, 4, 6, 7, 8, 9}
OD. {2, 6, 7}