Answer:
B. belief perseverance.
Step-by-step explanation:
Belief perseverance refers to a tendency that people have to hold unto their preconceived notions or beliefs even after new evidence that contradicts them comes to light. Belief perseverance makes it very difficult for people to change their minds or to adopt new information that contradicts their beliefs. In this case, Judy refuses to change her mind about her professor even after it becomes obvious that her initial assumption was not based on reality.