Which of the following ores undergo roasting?

The correct options are
A $\text{ZnS}$
C ${\text{Cu}}_2\text{S}$
Roasting is a process of heating the concentrated ore at the temperature below its melting point in the presence of air.

Sulphide ores are transformed into their oxide by this process. In the given options only $\text{ZnS}$ and ${\text{Cu}}_2\text{S}$ are sulphide ores. So, roasting is done only for $\text{ZnS}$ and ${\text{Cu}}_2\text{S}$.