An Example of a Child Who Has Not Developed an Understanding

An example of a child who has not developed an understanding of hierarchical categorization is which of the following?

A) Milagros knows that she has a doll but not that a doll is also a toy
B) Willie knows that a cat is an animal and thinks a banana is too
C) Juan knows that a ball is round but not that a grapefruit is also round
D) Damarr knows that his sister is a girl but not that his mother is