Which of the following psychological statements is most authentic and scientifically valid regarding the actual psychological implications of the concepts of 'Zone of Proximal Development - ZPD' and 'Scaffolding' propounded under Lev Vygotsky's 'Socio-Cultural Theory of Cognitive Development', and the scientific management of students' 'Collaborative Problem Solving' and 'Internalization' of 'Cultural Tools' in classroom teaching?

In Lev Vygotsky's socio-cultural theory, the 'Zone of Proximal Development' (ZPD) represents the gap between what a child can do independently and what they can do with the guidance of an adult or More Knowledgeable Other (MKO). 'Scaffolding' is a term coined by Jerome Bruner and associated with Vygotsky's theory, meaning temporary support provided in the early stages of learning which is gradually reduced as the child becomes capable. This is extremely important for child-centered and collaborative learning.