When Teaching Something New to a Child, Vygotsky Pointed Out

When teaching something new to a child, Vygotsky pointed out that:

A) Competencies come about as a result of interactions between novices and more skilled members of a society acting as tutors or mentors.
B) One can measure a child's capability by that child's performance of a skill the child has accomplished already.
C) Children's development is enhanced when they work independently.
D) The young child's process of learning is passive and completely dependent on the environment.