The Zone of Proximal Development Refers To

The zone of proximal development refers to:

A) the difference between a child's level of performance while working alone and while working with a more experienced partner
B) the difference between a child's performance while working with an equally experienced partner and while working with a more experienced partner
C) the difference in performance between a child working with an experienced partner and another child working alone
D) the difference in performance between a child working with a age-appropriate task and a task that is intended for children at other ages