Please answer this for me

Let x, y, z be propositional variables, and let P and Q be the following compound proposi- tions: P : - (xV z) + (yo-2) Q: z - ((IAy) -+ 2 ) What types of propositions are P and Q? Select the correct response: A. P and Q are both contingencies. B. P is a contingency and Q is a contradiction. C. P is a contingency and Q is a tautology. D. P is a contradiction and Q is a contingency. E. P and Q are both contradictions. F. P is a tautology and Q is a contingency. G. P is a tautology and Q is a contradiction. H. P and Q are both tautologies