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.)
Q ≡ R
~(S ∨ Q) / R
(A)Valid (B)Invalid. Counterexample when Q and S are true and R is false (C)Invalid. Counterexample when Q is true and S and R are false (D)Invalid. Counterexample when Q, S, and R are false
D