Which of the following children is illustrating the impact of motor-skill development on the development of perceptual skills?

a. Jason, a 6-month-old infant, can hold, turn, and stroke the toy duck which allows him to learn about the three-dimensional nature of the toy duck.
b. Franklin, a 4-month-old infant, is able to tell that the banana and the apple are different objects because of the differences in shape and color.
c. Veronica, an 8-month-old infant, demonstrates knowledge of depth by avoiding crawling over the deep side of a visual cliff.
d. Carina, a 3-month-old infant, will focus almost entirely on the interior of the face, particularly the eyes and the lips.

a