Answer:
I think it is a tool-and-die subcontractor
Step-by-step explanation:
A tool and die maker is someone who sets up and operates a variety of computer-controlled or mechanically-controlled machine tools to produce precision metal parts, instruments, and tools. I think that fits the bill for sheet metal. Mining company supplies ores. Car manufacturer is a throw away. Primary focuses on smelting an refining the ores they got from the mining company
Answer: C