Construct a complete truth table for the following argument. Then, using the truth table, determine whether the argument is valid or invalid. If the argument is invalid, choose an option which presents a counterexample. (There may be other counterexamples as well.)
(G ≡ H) · ~I
~G ∨ (~H ∨ I) / G
(A)Valid (B)Invalid. Counterexample when H and I are true and G is false (C)Invalid. Counterexample when H is true and I and G are false (D)Invalid. Counterexample when H, I, and G are false
D