Which of the Following Statements Is True About Scaffolding

Which of the following statements is true about scaffolding?

A) Studies indicate that when adults used explicit scaffolding (encouragement) with 13- and 14-month-old infants, they were twice as likely to engage in helping behavior as were their counterparts who did not receive the scaffolding.
B) A study of disadvantaged families revealed that an intervention designed to enhance maternal scaffolding with infants was linked to lower cognitive skills when the children were 4 years old.
C) Turn taking and games like peek-a-boo seldom reflect the development of joint attention by the caregiver and the infant.
D) Scaffolding discourages parental support in children's efforts; the emphasis is on allowing children to be more skillful by relying only on their own abilities.