Cathy and Sherri Had to Finish All of Their Vegetables

question 75

Multiple Choice

Cathy and Sherri had to finish all of their vegetables before they could have dessert. Cathy complained that Sherri didn't have as much to finish as she did, even though both girls had the same amount (Cathy's vegetables were just more spread out) . Cathy's error stems from a failure to understand the concept of

• A)conservation.
• B)complementarity.
• C)concrete operations.
• D)object permanence.