In Terms of Perceptual and Motor Development, Which Statement Does

In terms of perceptual and motor development, which statement does NOT present a reason as to why infancy is such an important time?

A) Extremely rapid changes occur in perception, action, learning, and cognition during the first 2 years of life.
B) Infant development in perception, action, learning, and cognition are intertwined.
C) The methods used to investigate infants' development in perception, action, learning, and cognition are similar to methods used to study older children.
D) Most recent research on perceptual and motor development has focused on infants and young children.