In the neuro-cognitive context of the sociocultural theory of development, which of the following statements is most appropriate and true regarding the neuro-biological nature of the Zone of Proximal Development (ZPD) and Scaffolding under the Sociocultural Theory proposed by Lev Vygotsky, the activation dynamics of social mediation, internal speech internalization, and co-regulation among the dorsolateral prefrontal cortex (DLPFC), mirror neuron system (specifically the inferior frontal gyrus and inferior parietal lobe), and language network, and the interrelationships of Jerome Bruner's concept of scaffolding and cultural tools and their implications in modern primary inclusive classroom teaching, social-constructivist literacy pedagogy, and the promotion of higher-level cognitive functions, cultural mediation, and overall mental development in students?