Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

• A. The \[\Delta G_{f}^{{}^\circ }\] of the sulphide is greater than those for \[C{{S}_{2}}\] and \[{{H}_{2}}s\].
• B. The \[\Delta G_{f}^{{}^\circ }\] is negative for roasting of sulphide ore to oxide.
• C. Roasting of the sulphide to the oxide is thermodynamically feasible.
• D. Carbon and hydrogen are suitable reducing agents for reduction of metal sulphides.