Xavier Wants to See If His Daughter Knows That She

Multiple Choice

Xavier wants to see if his daughter knows that she exists. While he is wiping her face, he puts a red dot on her nose and then shows her own reflection in a mirror. At what age would we expect her to reach up and touch her own nose instead of reaching for the nose in the reflection?

A) ​8 months
B) ​10 months
C) ​12 months
D) ​15 months