Context: I ' m doing this job as one , one last job for someone I once knew . For old time 's sake . I used to do jobs like this all the time ; I used to relish the dark . I used to be a PI , a man who could find things out on the quiet .

Question: What may be the reason for them not doing PI work anymore ?
Options:
0. They are n't as good at it anymore .
1. They are n't paid enough .
2. None of the above choices .
3. They are getting old .
Answer: 3