Answer:
c. Lev Vygotsky
Step-by-step explanation:
Lev Vygotsky is a Russian Psychologist. He developed the Sociocultural Theory; which stated that social interactions would cause a continuous change in childrens behavior. Four main elements are private speech, zone od proximinal development, subjectivity and scaffolding. Often compared to psychologist Jean Piagot. The difference is Vygotsky favored the cultural line of development.