According to Lev Vygotsky's sociocultural theory, which of the following statements is true?
A child should learn without the help of adults or more advanced peers through self-learning techniques.
Sensitive and effective instruction should be aimed at the zone of proximal development (ZPD).
A child should be governed by their ego, rather than their id, for effective learning.
Sensitive and effective instruction should decrease in complexity as a child's abilities improve.