In this exercise, let P and Q be predicates on a common domain of discourse. Mark all statements that must be true, no matter what P and Q are. Group of answer choices If P(x) is true for all x or Q(x) is true for all x, then P(x)Q(x) is true for all x. If P(x) is true for all x and Q(x) is true for all x, then P(x)Q(x) is true for all x. If P(x)Q(x) is true for all x, then P(x) is true for all x, or Q(x) is true for all x. If P(x)Q(x) is true for all x, then P(x) is true for all x and Q(x) is true for all x