Final answer:
The correct answer is B. physical-attractiveness stereotype.
Step-by-step explanation:
The correct answer is B. physical-attractiveness stereotype. April's father inadvertently reinforces the notion that physical appearance determines whether someone is a hero or a villain. This perpetuates the stereotype that beautiful people are good and ugly people are bad. By reading stories that consistently depict this pattern, April is likely to internalize and develop a bias based on physical attractiveness.