Which One of the Following Statements Best Describes a Developmental

Which one of the following statements best describes a developmental systems perspective of child development?

A) Children's growing knowledge structures are at first relatively separate and isolated, but they increasingly become integrated and interactive.
B) Children are influenced by their environment, but so, too, do they influence the environment in which they grow up.
C) Traumatizing events in the early years can have a lifelong impact on children's emotional well-being.
D) Developmental progressions in the cognitive, emotional, and social domains are interrelated throughout childhood and adolescence, such that advancements in one domain invariably influence development in other domains as well.