The narrator is a lawyer is an explicit detail in the passage.
What is narrator?
The person who tells a narrative from their point of view is the narrator. A somebody who adds verbal commentary to a movie, TV show, slide show, etc.
The narrator is a lawyer because the passage line is "My client Justin sat in my office" usually client means a person or organization using the services of a lawyer or other professional person or company.
Narrator as a lawyer suggest to Justin, "I told him that he should lie low. The best way to help me win his upcoming trial was for him to stay out of trouble".
As a result, option (a) The narrator is a lawyer is correct
Learn more about on narrator, here:
https://brainly.com/question/12020368
#SPJ1