Answer:
The correct answer is B: Prejudice.
Step-by-step explanation:
The logic behind Graham's assumption is that every football player is disruptive to a study environment. Since Graham has not yet met his roommate, he is judging that person's character based only on assumed group membership.
Stereotype Threat occurs when a group is stereotyped in a negative manner, and people who are perceived as part of that group feel insecure and less capable of performing at their full potential.
Discrimination is the belief that people from a certain group should be treated differently merely for being part of that group.
Scapegoating is the habit of blaming a person or a group of people for something they did not do.
Assumptions are only justified when based on known and checked facts.