The Zone of Proximal Development

The zone of proximal development

A) includes core domains of thought, such as physical knowledge, linguistic knowledge, psychological knowledge, and numerical knowledge.
B) refers to a range of tasks too difficult for the child to do alone but possible with the help of more skilled partners.
C) is a Piagetian concept that provides that infants stumble onto a new experience and then actively try to repeat it.
D) helps identify for intervention babies who are likely to have developmental problems.