Five-Year-Old Tammy Mistakenly Believes That Her Short,wide Glass Contains Less

Multiple Choice

Five-year-old Tammy mistakenly believes that her short,wide glass contains less soda than her brother's tall,narrow glass.Actually,both glasses contain the same amount of soda.This illustrates that Tammy lacks the concept of

A) conservation.
B) egocentrism.
C) assimilation.
D) object permanence.