[(T ⊃ W) • (X ⊃ W)] ⊃ [(T $\lor$

[(T ⊃ W) • (X ⊃ W) ] ⊃ [(T $\lor$ X) ⊃ W]
Which of the following propositions is a proper assumption for conditional proof to prove that the above wff is a logical truth of PL?

A) [(T ⊃ W) • (X ⊃ W) ] ⊃ [(T $\lor$ X) ⊃ W]
B) [(T ⊃ W) • (X ⊃ W) ] ⊃ (T $\lor$ X)
C) (T ⊃ W) • (X ⊃ W)
D) (T ⊃ W)
E) T