Use indirect truth tables to determine whether the following argument is valid. If the argument is invalid, choose an option which presents a counterexample. (There may be other counterexamples as well.)
L ⊃ [(M ∨ ~N) ⊃ O]
(N ⊃ O) ⊃ (~P ⊃ Q)
R ⊃ ~Q / L ⊃ (R ⊃ P)
(A)Valid (B)Invalid. Counterexample when L, M, O, Q, and R are true and N and P are false (C)Invalid. Counterexample when L, N, O, Q, and R are true and M and P are false (D)Invalid. Counterexample when L, N, and R are true and M, O, P, and Q are false
D