Use indirect truth tables to determine whether each set of propositions is consistent. If the set is consistent, choose an option with a consistent valuation. (There may be other consistent valuations.)
D ≡ E
F ∨ D
~E · ~F
(A)Inconsistent (B)Consistent. Consistent valuation when D, E, and F are true (C)Consistent. Consistent valuation when D and E are true and F is false (D)Consistent. Consistent valuation when D and F are true and E is false
A