You Place Five Pennies in a Row and Then Take

Multiple Choice

You place five pennies in a row and then take five more pennies and place them in a row directly below the other, so that the pennies in the two rows are paired. Your five-year-old son tells you that there are the same number of pennies in each row. You then spread out the pennies on the bottom row so that it looks longer. Your son now thinks that the bottom row has more pennies, showing that he lacks

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