Four-Year-Old Lenny Has Invented an Imaginary Companion, an Invisible Octopus

Four-year-old Lenny has invented an imaginary companion, an invisible octopus named Squiggy. How would a Piagetian most likely react to Lenny's behavior?

A) He might suspect that Lenny is cognitively and socially advanced.
B) He would see it as a sign of possible mental illness.
C) He would suggest that Lenny cannot decenter from an object.
D) He would state that it is impossible for a child that young to create any imaginary companions.