The best answer that I would choose is to do or make because in a factory that's basically what you do there and you have to think of the meaning of words in order to answer questions like this.
so the answer is C.
HOPE THIS HELPS :)
Answer:
they
Explanation:
The subject pronoun is they because it takes the place of the noun.
is the writer's attitude or feelings about the subject that he / she is presenting
