Which One of the Following Statements Most Accurately Describes Lev

Which one of the following statements most accurately describes Lev Vygotsky's view of how cognitive development occurs?

A) Children's cognitive growth is a process of adults modeling and then reinforcing increasingly complex behaviors.
B) Cognitive development progresses through four distinct stages; each stage is characterized by increasingly complex thought and language.
C) Children develop by working on challenging tasks with the assistance of more competent individuals.
D) Language and thought,although closely intertwined in the first few years of life,become increasingly distinct entities over time.