In Vygotsky's Theory of Cognitive Development, What Important Role Does

In Vygotsky's theory of cognitive development, what important role does inner speech play?

A) By giving themselves directions about the things to do and in what order, children guide themselves through complex tasks.
B) By using words mentally as well as orally, children develop more abstract representations of the world.
C) By practicing various grammatical structures mentally, children acquire more complex language capabilities.
D) By talking to themselves about what they should have done or said in a particular situation, children remember the situation more vividly.