Which Person Is Teaching by Using Vygotsky's Zone of Proximal

Multiple Choice

Which person is teaching by using Vygotsky's zone of proximal development (ZPD) ?

A) Ms. Trong, who spaces the desks in a classroom so that every student can see the board
B) Mr. Smith, who figures out what each child knows now and then determines what that child is capable of understanding through instruction
C) Mrs. Banda, who makes sure that every student learns at the same pace
D) Mr. Doud, who has the class do individual projects