What is the zone of proximal development (ZDP)?

C / Explanation:
A)    The zone of proximal development is the difference between what a student can do independently and what he or she can do when provided with scaffolding. It is the difference between what a child has learned and what a child is capable of achieving.
B)    The zone of proximal development is the difference between what a student can do independently and what he or she can do when provided with scaffolding. It is the difference between what a child has learned and what a child is capable of achieving.
C)    The zone of proximal development is the difference between what a student can do independently and what he or she can do when provided with scaffolding. It is the difference between what a child has learned and what a child is capable of achieving.
D)    The zone of proximal development is the difference between what a student can do independently and what he or she can do when provided with scaffolding. It is the difference between what a child has learned and what a child is capable of achieving.