Answer:
b) prejudice
Step-by-step explanation:
Devin decides not hire Margraret because she has a history of being a drug addict although she has been on rehab for drug addiction, and that she has been clean and sober for over 3 years.
Devin believes that people with drug habits are not trustworthy, which is not always true. Devin's actions are demonstrating Prejudice.
Being Prejudice meaning having a firm believe about something being right or wrong. Its a preconceived notion that is not based on any reason or actual experience.