Stephan Is 5 Years Old,and Is Able to Put Moderate-Sized

Multiple Choice

Stephan is 5 years old,and is able to put moderate-sized jigsaw puzzles together with the help of his older brother.If he tries to do the puzzle on his own,he will usually be unsuccessful.According to Lev Vygotsky,putting together these puzzles falls in Stephan's ______.

A) zone of optimal development
B) zone of proximal development
C) schema of preoperational development
D) range of accommodation