Which of the processes represented by the following equations has the greatest positive entropy change?

• A.C₆H_3(l) → C₆H _{6 (g)}
• B.H₂O _(s) → H₂O_(l)
• C.CuO_(s) + H_2(g) → Cu_(s) + H₂
• D.Na₂CO_3(s) + nH₂O_(l) →Na ₂CO₃nH₂O_(s)
• E.S_(s) → S_(l)