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

Question

( A ) The $\Delta _f G^θ$ of the sulphide is greater than those for $CS_2$ and $H_2S$
( B ) Carbon and hydrogen are suitable reducting agents for metal sulphides
( C ) Roasting of the sulphide to the oxide is thermodynamically feasible
( D ) The $\Delta _f G^θ$ is negative for roasting for sulphide ore to oxide