Answer:
The correct answer is - scientists, apprentice.
Step-by-step explanation:
Piaget and Vygotsky both are the psychologists that studied and presented theory of cognitive development social learning. Piaget consider all children go through different but similar stages of cognitive development.
Vygotsky on other hand argue that social learning such as cultural elements over cognitive development as cultures affects the cognitive development varies.
Thus, the correct answer is - scientists, apprentice.