2. According to Vygotsky’s sociocultural theory, which of the following teaching practices best supports students' learning within their Zone of Proximal Development (ZPD)?(A) Allowing students to work independently on tasks they have already mastered(B) Providing guided support during tasks that students cannot yet complete on their own but can accomplish with help(C) Designing collaborative learning activities where more capable peers assist in problem-solving and concept understanding(D) Implementing differentiated challenges that require learners to extend their current abilities through strategic teacher mediation