Kevin Is Just Learning to Walk

Multiple Choice

Kevin is just learning to walk. He can take a few steps by himself if he uses both hands to hold on to a piece of furniture for support. He can walk to the middle of a room only if one of his parents holds his hands. Which of the following represents the lower limit of Kevin's zone of proximal development (ZPD) for walking?

A) Kevin learning to run after he has mastered walking by himself
B) Kevin going back to crawling when he becomes frustrated trying to walk by himself
C) Kevin walking alone by holding on to a piece of furniture with his hands
D) Kevin learning to walk by holding his parents' hands