But then they slid a plastic tube in and the needle it and it was fine . They said I would feel cold going up my arm , but I never did . I remember the doctor telling me I would start seeing the walls move a little , but I was n't .
According to the above context, choose the best option to answer the following question.
Question: Why is the plastic tube being slid in the narrator 's arm ?
Options:
- The narrator is being toyed with by doctors .
 - The narrator is being treated by a doctor .
 - The narrator is being given ill treatment .
 - None of the above choices .


The narrator is being treated by a doctor .