Which of the Following Illustrates the Active Child Theme

Which of the following illustrates the active child theme?

A) A child's early experiences direct the synaptic pruning that occurs in the first years of life.
B) The timing of puberty depends on both your genetics and what sort of nutrition you have had.
C) Babies remain the same length for days, and then grow several centimeters all in one day.
D) Motor development in infants is related to the infant's cognitive and social goals.