Which of the Following May Explain Why Piaget Underestimated the Abilities

Multiple Choice

Which of the following may explain why Piaget underestimated the abilities of infants?

A) Limited physical skills were mistaken for limited cognitive skills.
B) Critical periods were mistaken for sensitive periods.
C) Babies are reaching physical and mental maturational readiness at an earlier age than when Piaget was observing their behaviors.
D) The children used in his study may not have developed verbal skills.