Which of the Following Would Not Be an Example of an Early

Which of the following would not be an example of an early or immature form of development which adapts the infant or young child to his or her particular environment?

A) A young infant's relatively poor perceptual abilities which protect their nervous systems from sensory overload.
B) Preschool children tendencies to overestimate their physical and cognitive skills causing to persist at different tasks.
C) Infant's slow information processing seems to prevent them from establishing intellectual habits later in life.
D) The spontaneous activity of the skeletal structures necessary for physical development.