casting milling finishing refining
I gave my students this multiple choice question: In the first step of making some ceramic cups, the following manufacturing process is used. Liquid clay is poured into a mold, allowed to solidify, then removed from the mold. What is the name of this manufacturing process?

Only one answer is correct among these 4 choices:
- casting
- milling
- finishing
- refining

Could you tell me which one is correct?

casting