Answer:
The correct answer is D. Although there is variability in the ages at which infants acquire various skills, the order in which skills are acquired is fairly consistent.
Explanation:
An infant's motor development occurs from the center of the body, from the top to the bottom. This means they control their heads, for example, before their feet.
It is fair to say that the ages in which an infant acquires the skills are consistent; he/she starts to develop gross and fine skills regularly.