Final answer:
The correct answer is option b. stereotype.
Step-by-step explanation:
The belief expressed in the statement is an example of a stereotype. Stereotypes are oversimplified generalizations about groups of people that may be based on physical characteristics, such as hair color, race, or any other trait. They can be positive or negative but often lead to inaccurate assessments of individual differences within a group.
The statement makes a sweeping generalization about blondes, assigning them characteristics without considering individual variations, thereby fitting the definition of a stereotype perfectly.