Julia is given a hypothetical rule that "a feather can break a glass." even though this doesn't happen in real life, she accepts the rule and can apply it when tested. julia is most likely in piaget's of cognitive development.

Formal operational stage

Explanation:

The fourth and last stages of formal operational stage. It is Jean Piaget's theory of cognitive development. This stage is started from the age of 12 and till last adulthood. At this age, the thinking level is so changed and sophisticated and think logically. Kids start to think abstractly and conceptually. Kids start to think logically and provide a creative solution. Logical thinking such as creativity, inductive, deductive reasoning and systematic planning also emerge during this stage.  

answer; occurs if the conflict is recognized logically and intellectualized;

answer; language that can promote racial stereotypes;