Mrs Weston Asks Colin If He Wants His Sandwich in One

Multiple Choice

Mrs. Weston asks Colin if he wants his sandwich in one piece, or cut into two pieces. Colin asks her to keep it in one piece, because he isn't hungry enough to eat two pieces. Colin's answer suggests that he:

A) has not achieved object permanence.
B) does not understand reversibility.
C) does not yet understand conservation.
D) has mastered the concept of egocentrism.