Kara gets an F on her social psychology exam. Then she goes home and gets into an argument with her roommate, Lee. Lee assumes Kara is yelling at him because she is just a nasty person, and does not consider that she may just have had a bad day and is venting. Lee is demonstrating ________.

A) groupthink
B) the self-serving bias
C) the actor-observer effect
D) the fundamental attribution error

Fundamental Attribution Error

The tendency for observers to underestimate situational influences and overestimate personal characteristics when explaining others' behaviors.

Actor-observer Effect

The tendency to attribute one's own actions to external factors while attributing others' actions to their character or disposition.

Self-serving Bias

A cognitive bias where individuals attribute their successes to personal factors and their failures to external factors, often to maintain self-esteem.