A 2-Year-Old Girl Is Visiting the Zoo for the First

A 2-year-old girl is visiting the zoo for the first time, with her father. As they look at the monkeys, an adult monkey comes close to the girl and begins reaching out to her. The girl initially seems nervous but looks at her father and, seeing that he is smiling, looks back at the monkey, laughs, and talks to it playfully. This is an example of .

A) theory of mind
B) self-recognition
C) social smiling
D) social referencing