It Is Winter and Angelo,who Is Two Years Old,needs to Get

Multiple Choice

It is winter and Angelo,who is two years old,needs to get dressed to play outside.Instead of putting his jacket on for him and doing it up,she tells him to put his jacket on himself and only helps him by getting the zipper started.He knows that he must do the rest.As the winter goes on,he learns how to do everything on his own.This is an example of

A) scaffolding.
B) the zone of proximal development.
C) egocentrism.
D) intersubjectivity.