Final answer:
Britney's understanding of her father's emotions due to his friend's passing indicates she has developed a theory of mind.
Step-by-step explanation:
Britney understands that her father is crying because his best friend died. This shows that Britney has developed theory of mind. Theory of mind is the ability to recognize and understand the thoughts, beliefs, and emotions of another person, acknowledging that others can have different perspectives and feelings from one's own.
This cognitive empathy begins to increase during adolescence and is crucial for effective social interaction and conflict resolution. In contrast, egocentrism is when a child is unable to take the perspective of others, believing that everyone sees and thinks as they do. The concept of a script for crying is not a standard psychological term and conservation refers to the understanding that quantity remains the same even when its shape changes, which is unrelated to understanding emotional states.