Which of the Following Examples Best Illustrates the Concept of Horizontal

Multiple Choice

Which of the following examples best illustrates the concept of horizontal décalage?

A) A 6-year-old can solve class inclusion problems, whereas a 4-year-old cannot.
B) A 7-year-old conserves mass and liquids but fails to show object permanence.
C) A 10-year-old can solve all versions of the classic Piagetian conservation tasks, except for the conservation of volume.
D) A 12-year-old reasons both inductively and deductively.