Recently,Josephine Has Been Able to Understand That When You Cut

Multiple Choice

Recently,Josephine has been able to understand that when you cut a piece of pie in half you still have the same amount of pie,something she was not able to understand a short time ago.According to Piaget's theory,Josephine

A) must be at least three years of age.
B) must have been rewarded by her mother for this understanding.
C) has advanced to a different stage of cognitive development.
D) will understand this only for pieces of pie but not for any other stimuli.