Problem 3 ? If AnB = {} and BNC = {}, then AnC = {} BCANB AnBCB AUBCA BC AuB If BCA, then AUB = B If AccB and BcC, then CcCA If BCA, then AuB = A If AUB = B, then AcB Which of the following is/are always true? (Select all that apply.) (Q6) If AuB = C and AnC = {), then A = $